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 Quarterly 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, 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 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 Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Entity Common Stock, Shares Outstanding CONDENSED 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 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 Other Liabilities, Current 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 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 Stockholders' Equity Attributable to Parent Balance at the ending Balance at the beginning Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity 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 CONDENSED 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 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 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 CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN 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] 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, New Issues Issuance of common stock through Private Placement, net of issuance costs of $357 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, Shares, Restricted Stock Award, Gross Vesting of restricted stock units (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) APIC, Share-based Payment Arrangement, Increase for Cost Recognition Stock-based compensation CONDENSED 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 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 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 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 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 of Private Placement Proceeds from 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 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 Shares issued in settlement of the award Net Cash Provided by (Used in) Financing Activities Cash used in financing activities Net cash used in 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 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 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 Commitments and Contingencies. Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Net Loss Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Net Loss Per Share Attributable to Common Stockholders Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions Segment Information Segment Reporting Disclosure [Text Block] Segment Information Basis of Accounting, Policy [Policy Text Block] Basis of Presentation and Liquidity Use of Estimates, Policy [Policy Text Block] Use of Estimates Disclosure of accounting policy for impact of covid-19. Impact of COVID-19 [Policy Text Block] Impact of COVID-19 Earnings Per Share, Policy [Policy Text Block] Net Loss per Share Attributable to Common Stockholders Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Restricted Cash Accounts Receivable [Policy Text Block] Accounts Receivable and Allowances Inventory, Policy [Policy Text Block] Inventory Property, Plant and Equipment, Policy [Policy Text Block] Property and Equipment Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Long-Lived Assets Revenue from Contract with Customer [Policy Text Block] Revenue Recognition Deferred Charges, Policy [Policy Text Block] Deferred Rent Share-based Payment Arrangement [Policy Text Block] Stock-Based Compensation Plans Research and Development Expense, Policy [Policy Text Block] Research and Development Costs Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Major Customers, Policy [Policy Text Block] Significant Customers Comprehensive Income, Policy [Policy Text Block] Comprehensive Income (Loss) Income Tax, Policy [Policy Text Block] Income Taxes Restrictions on Cash and Cash Equivalents [Table Text Block] Summary of reconciliation of cash and restricted cash included in the consolidated balance sheets The tabular disclosure of estimated useful lives of the assets. Schedule Of Estimated Useful Lives Of Assets [Table Text Block] Summary of estimated useful lives of the assets Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Schedule of largest customers as well as their respective percentage of total accounts receivable Share-based Payment Arrangement, Option, Activity [Table Text Block] Summary of stock options outstanding, exercisable and vested or expected to vest Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Schedule of RSU activity Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of stock-based compensation expense recognized Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of weighted-average assumptions were used to determine the fair value of options Schedule of Inventory, Current [Table Text Block] Summary of inventory Schedule of Debt [Table Text Block] Summary of PPP loan recorded within long-term debt Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of net loss per share attributable to common stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of potential common shares excluded from calculation, presented based on amounts outstanding at period end, from the computation of diluted net loss per share attributable to common stockholders Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of sales information Cash and Restricted Cash Property, Plant and Equipment [Table] Statistical Measurement [Axis]