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 Loss Contingency, Receivable, Current Receivables of FiberCel litigation costs 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 Operating lease right-of-use assets and other Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity (Deficit) 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 Estimated Litigation Liability, Current Contingent liability for FiberCel litigation Other Liabilities, Current Current operating lease liabilities and other 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 Operating Lease, Liability, Noncurrent Long-term operating lease liabilities Long-term operating lease liabilities Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 8) 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 Accumulated deficit Retained earnings Stockholders' Equity Attributable to Parent Balance at the ending Balance at the beginning Total stockholders' equity (deficit) Liabilities and Equity Total liabilities and stockholders' equity (deficit) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollar per share) 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 Gross profit Selling and Marketing Expense Sales and marketing General and Administrative Expense General and administrative Research and Development Expense Research and development Legal Fees FiberCel litigation costs, net Operating Expenses Total operating expenses Operating Income (Loss) Loss from operations Interest Expense Interest expense Other Nonoperating Income (Expense) Other income, 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 Net loss Earnings Per Share, Basic Net loss per share - basic (in dollar per share) Net loss per common share attributable to common stockholders, basic (in dollar per share) Earnings Per Share, Diluted Net loss per share - diluted (in dollar per share) Net loss per common share attributable to common stockholders, diluted (in dollar per share) 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 STATEMENT OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) Equity Components [Axis] Equity Component [Domain] Common Stock Additional Paid-in Capital Accumulated Deficit Sale of Stock [Axis] Sale of Stock [Domain] IPO [Member] Private Placement [Member] 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) Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Additional issuance costs in connection with private placement Stock Issued During Period, Value, Employee Stock Purchase Plan Proceeds from sale of common stock through Employee Stock Purchase Plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Proceeds from sale of common stock through Employee Stock Purchase Plan (in shares) Shares issued under ESPP Stock Issued During Period, Value, New Issues Issuance of common stock, net of issuance costs Stock Issued During Period, Shares, New Issues Issuance of common stock, net of issuance costs (in shares) Stock Issued During Period, Value, Restricted Stock Award, Gross Vesting of restricted stock units, net of shares withheld and taxes paid Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of restricted stock units (in shares) Adjustments to Additional Paid in Capital, Warrant Issued Issuance of warrants in connection with debt financing APIC, Share-based Payment Arrangement, Increase for Cost Recognition Stock-based compensation 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 extinguishment of debt Gain on extinguishment of debt Loss on extinguishment 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 Amortization of Debt Issuance Costs and Discounts Amortization of deferred financing costs and debt discount 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 or long-term debt Interest accrued to Revenue Interest Obligation Share-based Payment Arrangement, Noncash Expense Stock-based compensation 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 Insurance Settlements Receivable Receivables of FiberCel litigation costs 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 contingent liability. Increase (Decrease) Contingent Liability Contingent liability for FiberCel litigation 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 Cash 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 secondary public offering or private placement, net of offering costs Proceeds from (Repayments of) Lines of Credit Net borrowings (repayments) under revolving line of credit Proceeds from Stock Options Exercised Proceeds from stock option exercises Proceeds from Issuance of Other Long-term Debt Proceeds from long-term debt Payments of Financing Costs Deferred financing costs Deferred financing costs Repayments of Long-term Debt Repayments of long-term debt The cash outflow for the payment of interest and fees upon early repayment of debt. Payment of Interest and Fees On Early Repayment of Debt Costs related to the extinguishment of debt The cash outflow on payments on revenue interest obligation. Payments On Revenue Interest Obligation Payments on revenue interest obligation Payment, Tax Withholding, Share-Based Payment Arrangement Payments for taxes upon vesting of restricted stock units 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 Proceeds from Issuance of Private Placement Additional issuance costs in connection with Private Placement Net proceeds received 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 The amount of fair value of warrants issued. Fair Value of Warrants Issued Fair value of warrants issued 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 Leases Lessee, Operating Leases [Text Block] Leases Intangible Assets Intangible Assets Disclosure [Text Block] Intangible Assets Long-Term Debt Debt Disclosure [Text Block] Long-Term Debt No definition available. Revenue Interest Obligation The entire disclosure on revenue interest obligation. Revenue Interest Obligation [Text Block] Revenue Interest Obligation Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Income Taxes Income Tax Disclosure [Text Block] Income Taxes Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity