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v3.23.1

Note 1 - Organization and Significant Accounting Policies (Details Textual) |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 29, 2020 USD ($) | Apr. 20, 2020 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Nov. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
Number of Reportable Segments |  |  |  | 1 |  |  |  |
Number of Reporting Units |  |  |  | 1 |  |  |  |
Contract with Customer, Liability, Revenue Recognized |  |  |  | $ 511,000 |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  |  |  | $ 221,000 |  | $ 388,000
Impairment of Intangible Assets (Excluding Goodwill), Total |  |  |  | 110,400,000 | $ 0 | 0 |  |
Unrecognized Tax Benefits, Ending Balance |  |  |  | 610,000 | 255,000 | 96,000 |  |
Advertising Expense |  |  |  | $ 768,000 | $ 552,000 | $ 167,000 |  |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 18.00% | 17.00% | 13.00% |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |  |  |  |
Number of Major Customers |  |  |  | 2 | 2 |  |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Customers [Member] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 26.00% | 32.00% |  |  |
Supplier Concentration Risk [Member] | Accounts Payable [Member] |  |  |  |  |  |  |  |
Number of Suppliers |  |  |  | 1 |  |  |  |
Supplier Concentration Risk [Member] | Accounts Payable [Member] | One Supplier [Member] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 23.00% | 10.00% |  |  |
Tax Attributes Carried Forward [Member] |  |  |  |  |  |  |  |
Unrecognized Tax Benefits, Ending Balance |  |  |  | $ 610,000 |  |  |  |
Assets Held for Rent [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 3 years |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill), Total |  |  |  | $ 0 | $ 0 | $ 0 |  |
Minimum [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 3 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 10 years |  |  |  |
Contingent Convertible Preferred Stock [Member] | Series A-1 and A-2, Preferred Stock [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  | $ 4,100,000 | 3,400,000 |  |  |
Contingent Convertible Preferred Stock [Member] | Series E Preferred Stock [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  | 995,000 | 995,000 |  |  |
Contingent Convertible Preferred Stock [Member] | Series E Preferred Stock [Member] | PanTHERA Cryosolutions Investment [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  | 995,000 |  |  |
Contingent Convertible Preferred Stock [Member] | Series A-2 Preferred Stock [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  |  |  | $ 1,000,000.0 |
Contingent Convertible Preferred Stock [Member] | Preferred Stock, Class E [Member] |  |  |  |  |  |  |  |
Contingent Milestone Payment |  |  |  |  |  | 2,000,000.0 |  |
Contingent Millstone Payment, #1 |  |  | $ 200,000 |  |  |  |  |
Contingent Convertible Preferred Stock [Member] | Preferred Stock, Class E [Member] | PanTHERA Cryosolutions Investment [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  |  |  | $ 995,000 |
Convertible Debt Securities [Member] |  |  |  |  |  |  |  |
Debt Securities, Gain (Loss), Total |  |  |  | 697,000 | 0 | 1,300,000 |  |
Paycheck Protection Program CARES Act [Member] |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  | $ 2,175,320 |  | 0 | 0 | 2,175,000 |  |
Repayments of Debt | $ 2,175,320 |  |  | $ (0) | $ (0) | $ 2,175,000 |  |

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