Document and Entity Information Document Information [Table] Class of Stock [Axis] Class of Stock [Domain] Class A Common stock Class B Common stock Document Information [Line Items] Document Type Document Annual Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address State Or Province Entity Address, Address Line One Entity Address, Adress Line Two Entity Address, City or Town Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Public Float Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Entity Common Stock, Shares Outstanding Auditor Name Auditor Firm ID Auditor Location CONSOLIDATED BALANCE SHEETS Statement [Table] Statement [Line Items] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash Cash Restricted Cash, Current Restricted cash Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Inventory, Net Inventory Total Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Represents the amount payables to tissue suppliers, classified as current. Payables to Tissue Suppliers, Current Payables to tissue suppliers Short-term Debt Current portion of long-term debt Amount of revenue interest obligation, classified as current. Revenue Interest Obligation, Current Current portion of revenue interest obligation Line of Credit, Current Revolving line of credit Deferred Revenue, Current Deferred revenue and other current liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Long-term debt Amount of revenue interest obligation, classified as noncurrent. Revenue Interest Obligation, Noncurrent Long-term revenue interest obligation Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 9) Stockholders' Equity Stockholders' equity (deficit): Common Stock, Value, Issued Common stock Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Balance at the ending Balance at the beginning Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Temporary Equity, Par or Stated Value Per Share Series A Preferred stock, par value Temporary Equity, Shares Outstanding Balance at the ending (in shares) Balance at the beginning (in shares) Series A Preferred stock, shares outstanding Convertible Preferred Stock outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding CONSOLIDATED STATEMENTS OF OPERATIONS Revenue from Contract with Customer, Including Assessed Tax Net sales Total sales Cost of Goods and Services Sold Cost of goods sold Gross Profit Gross profit Selling and Marketing Expense Sales and marketing General and Administrative Expense General and administrative Research and Development Expense Research and development Operating Expenses Total operating expenses Operating Income (Loss) Loss from operations Interest Expense Interest expense Other Nonoperating Income (Expense) Other (income) expense, net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Loss before provision for income taxes Income Tax Expense (Benefit) Income tax expense Net Income (Loss) Attributable to Parent Net loss Net loss Temporary Equity, Accretion to Redemption Value, Adjustment Accretion of Convertible Preferred Stock Net Income (Loss) Available to Common Stockholders, Basic Net loss attributable to common stockholders Net loss attributable to common stockholders Earnings Per Share, Basic Net loss per share - basic Net loss per common share attributable to common stockholders, basic Earnings Per Share, Diluted Net loss per share - diluted Net loss per common share attributable to common stockholders, diluted Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding - basic Weighted Average Number of Shares Outstanding, Diluted Weighted average common shares outstanding - diluted Weighted average number of common shares, diluted CONSOLIDATED STATEMENTS OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) Equity Components [Axis] Equity Component [Domain] Common Stock Additional Paid-in Capital Accumulated Deficit Convertible Preferred Stock Sale of Stock [Axis] Sale of Stock [Domain] Private Placement [Member] Increase (Decrease) in Temporary Equity [Roll Forward] Temporary Equity, Carrying Amount, Attributable to Parent Balance at the ending Balance at the beginning Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of Convertible Preferred Stock, net of issuance costs The number of new stock classified as temporary equity issued during the period. Temporary Equity, Stock Issued During Period, Shares, New Issues Issuance of Convertible Preferred Stock, net of issuance costs (in shares) Issuance of Convertible Preferred Stock (in shares) The amount of accretion of the convertible preferred stock redemption discount during the period. Temporary Equity Stock Accretion Of Redemption Discount Accretion of Convertible Preferred stock The gross value of temporary equity stock issued during the period upon the conversion of convertible securities. Temporary Equity Stock Issued During Period Value Conversion Of Convertible Securities Conversion of Preferred Stock to Class A and Class B Common Stock upon Initial Public Offering Number of temporary equity shares issued during the period as a result of the conversion of convertible securities. Temporary Equity Stock Issued During Period Shares Conversion Of Convertible Securities Conversion of Preferred Stock to Class A and Class B Common Stock upon Initial Public Offering (in shares) Increase (Decrease) in Stockholders' Equity [Roll Forward] Shares, Outstanding Balance at the ending (in shares) Balance at the beginning (in shares) Stock Issued During Period, Value, Stock Options Exercised Proceeds from stock option exercises Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised Proceeds from stock option exercises (in shares) Preferred Stock, Accretion of Redemption Discount Accretion of Convertible Preferred stock Value of preferred stock warrant exercises. Preferred Stock Warrant Exercises, Value Preferred stock warrant exercises Number of shares on preferred stock warrant exercises. Preferred Stock Warrant Exercises, Shares Preferred stock warrant exercises ( in shares) Number of shares issued on exercise of common stock warrants. Net Exercise Of Common Stock Warrants Net exercise of Common Stock warrants (in shares) Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock through Employee Stock Purchase Plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of common stock through Employee Stock Purchase Plan (in shares) Shares issued under ESPP Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of Preferred Stock to Class A and Class B Common Stock upon Initial Public Offering Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of Preferred Stock to Common Stock upon Initial Public Offering (in shares) Conversion of Preferred Stock to Class A and Class B Common Stock upon Initial Public Offering (in shares) The gross value of stock issued during the period upon conversion of class. Stock Issued During Period Value Shares Upon on Conversion Of Class Conversion of Common Stock to Class A and Class B Common Stock upon Initial Public Offering Number of shares issued during the period as a result of the conversion of class. Stock Issued During Period Shares Upon Conversion Of Class Conversion of Common Stock to Class A and Class B Common Stock upon Initial Public Offering (in shares) Stock Issued During Period, Value, New Issues Issuance of Class A and Class B Common Stock in Initial Public Offering, net of offering costs Stock Issued During Period, Shares, New Issues Shares issued Issuance of Class A and Class B Common Stock in Initial Public Offering, net of offering costs (in shares) APIC, Share-based Payment Arrangement, Increase for Cost Recognition Stock-based compensation IPO [Member] Payments of Stock Issuance Costs Issuance and offering costs CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] OPERATING ACTIVITIES: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Gain (Loss) on Extinguishment of Debt (Gain) loss on (forgiveness)/early extinguishment of debt Gain on forgiveness of debt The amount of gain (loss) on revaluation of revenue interest obligation and other. Gain (Loss) On Revaluation Of Revenue Interest Obligation And Other Gain on revaluation of revenue interest obligation and other Amortization of Debt Issuance Costs Amortization of deferred financing costs The amount of interest expense recorded as additional revenue interest obligation. Interest Expense Recorded As Additional Revenue Interest Obligation Interest expense recorded as additional revenue interest obligation Interest accrued to Revenue Interest Obligation The amount of interest expense recorded as convertible preferred stock. Interest Expense Recorded As Convertible Preferred Stock Interest expense recorded as Convertible Preferred Stock Share-based Payment Arrangement, Noncash Expense Stock-based compensation Other Noncash Expense Operating expense satisfied through Convertible Preferred Stock issuance Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventory Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Amount of increase (decrease) in obligation to tissue suppliers. Increase (Decrease) in Obligations to Tissue Suppliers Obligations to tissue suppliers Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable and other liabilities. Increase (Decrease) in Contract with Customer, Liability And Other Liabilities Deferred revenue and other liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] INVESTING ACTIVITIES: Payments to Acquire Property, Plant, and Equipment Expenditures for property, plant and equipment Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] FINANCING ACTIVITIES: Proceeds from Issuance Initial Public Offering Proceeds from Initial Public Offering, net of offering costs Proceeds from Issuance of Private Placement Proceeds from Private Placement, net of issuance costs Net proceeds received Proceeds from Warrant Exercises Proceeds from exercise of preferred stock warrants Proceeds from Convertible Debt Proceeds from issuance of Convertible Promissory Note Proceeds from (Repayments of) Lines of Credit Net borrowings (repayments) under revolving line of credit Proceeds from Issuance of Convertible Preferred Stock Proceeds from Convertible Preferred Stock issuance, net Proceeds from Stock Options Exercised Proceeds from stock option exercises Proceeds from Issuance of Other Long-term Debt Proceeds from long-term debt Repayments of Long-term Debt Repayments of long-term debt The cash outflow on payments on revenue interest obligation. Payments On Revenue Interest Obligation Payments on revenue interest obligation Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised Proceeds from sales of common stock through Employee Stock Purchase Plan Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Net decrease in cash and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and restricted cash, end of period Cash and restricted cash, beginning of period Total cash and restricted cash shown in statements of cash flows Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow and Non-Cash Financing Activities Disclosures: Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Debt Conversion, Converted Instrument, Amount Conversion of Convertible Promissory Note to Convertible Preferred Stock Debt Instrument, Decrease, Forgiveness Forgiveness of SBA PPP loan Organization and Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Description of Business Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Recently Issued Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Recently Issued Accounting Standards Stock-Based Compensation Share-based Payment Arrangement [Text Block] Stock-Based Compensation Inventory Inventory Disclosure [Text Block] Inventory Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Intangible Assets