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Note 1 - Organization and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Revenues By Product Line [Table Text Block] |
|  | Year Ended December 31, |
(In thousands, except percentages) |  | 2021⁽¹⁾ |  |  | 2020⁽²⁾ |  |  | 2019⁽³⁾ |
Product revenue |  |  |  |  |  |  |  |  |  |  |  |
Freezer and thaw |  | $ | 56,620 |  |  | $ | 13,548 |  |  | $ | 3,312 |
Cell processing |  |  | 44,965 |  |  |  | 30,946 |  |  |  | 23,367 |
Storage and cold chain services |  |  | 328 |  |  |  | 46 |  |  |  | 165 |
Service revenue |  |  |  |  |  |  |  |  |  |  |  |
Storage and cold chain services |  |  | 9,817 |  |  |  | 1,752 |  |  |  | - |
Rental revenue |  |  |  |  |  |  |  |  |  |  |  |
Storage and cold chain services |  |  | 7,426 |  |  |  | 1,795 |  |  |  | 527 |
Total revenue |  | $ | 119,156 |  |  | $ | 48,087 |  |  | $ | 27,371 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] |
|  | Year Ending December 31, |
(In thousands) |  | 2022 |  |  | 2023 |  |  | 2024 |  |  | Total |
Rental revenue |  | $ | 10,151 |  |  | $ | 3,748 |  |  | $ | 900 |  |  | $ | 14,799 |
Service revenue |  | $ | 67 |  |  | $ | 31 |  |  | $ | 10 |  |  | $ | 108 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year Ended December 31, |
(In thousands, except share and earnings per share data) |  | 2021 |  |  | 2020 |  |  | 2019 |
Basic earnings (loss) per common share Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  | $ | (7,635 | ) |  | $ | 2,667 |  |  | $ | (1,657 | )
Amount attributable to unvested restricted shares |  |  | - |  |  |  | (135 | ) |  |  | - |
Amount attributable to warrants outstanding |  |  | - |  |  |  | (82 | ) |  |  | - |
Net (loss) income allocated to common shareholders |  |  | (7,635 | ) |  |  | 2,450 |  |  |  | (1,657 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares issued and outstanding |  |  | 38,503,944 |  |  |  | 27,306,258 |  |  |  | 19,460,299 |
Basic (loss) earnings per common share |  | $ | (0.20 | ) |  | $ | 0.09 |  |  | $ | (0.09 | )
Diluted earnings (loss) per common share Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income |  | $ | (7,635 | ) |  | $ | 2,667 |  |  | $ | (1,657 | )
Amount attributable to warrants |  |  | - |  |  |  | (20 | ) |  |  | - |
Less: gain related to change in fair value of warrants |  |  | - |  |  |  | (3,601 | ) |  |  | - |
Diluted (loss) earnings per common share |  |  | (7,635 | ) |  |  | (954 | ) |  |  | (1,657 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares issued and outstanding |  |  | 38,503,944 |  |  |  | 27,306,258 |  |  |  | 19,460,299 |
Diluted (loss) earnings per common share |  | $ | (0.20 | ) |  | $ | (0.03 | ) |  | $ | (0.09 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Stock options and restricted stock awards |  |  | 1,637,745 |  |  |  | 2,131,794 |  |  |  | 2,564,456 |
Warrants |  |  | 18,204 |  |  |  | 1,499,953 |  |  |  | 2,956,039 |
Total |  |  | 1,655,949 |  |  |  | 3,631,747 |  |  |  | 5,520,495 |
Schedule of Cash and Cash Equivalents [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2021 |  |  | 2020 |  |  | 2019 |
Cash and cash equivalents |  | $ | 69,860 |  |  | $ | 90,403 |  |  | $ | 6,448 |
Restricted cash |  |  | 10 |  |  |  | 53 |  |  |  | - |
Total cash, cash equivalents, and restricted cash |  | $ | 69,870 |  |  | $ | 90,456 |  |  | $ | 6,448 |
Revenue from External Customers by Products and Services [Table Text Block] |
|  | Year Ended December 31, |
Revenue by customers’ geographic locations |  | 2021 |  |  | 2020 |  |  | 2019 |
United States |  |  | 78 | % |  |  | 73 | % |  |  | 69 | %
Canada |  |  | 7 | % |  |  | 13 | % |  |  | 16 | %
Germany |  |  | 4 | % |  |  | 4 | % |  |  | 3 | %
Europe, Middle East, Africa (excluding Germany) |  |  | 10 | % |  |  | 8 | % |  |  | 11 | %
Other |  |  | 1 | % |  |  | 2 | % |  |  | 1 | %
Total revenue |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
(In thousands) |  | 2021 |  |  | 2020 |
United States |  | $ | 40,708 |  |  | $ | 30,389 |
Netherlands |  |  | 5,903 |  |  |  | - |
Total |  | $ | 46,611 |  |  | $ | 30,389 |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
|  | 2020 |  |  | 2019 |
Risk free interest rate |  |  | 0.1 | % |  |  | 1.9 | %
Expected dividend yield |  |  | 0.0 | % |  |  | 0.0 | %
Contractual remaining lives |  |  | 0.2 |  |  |  | 1.7 |
Expected volatility |  |  | 56.8 | % |  |  | 70.3 | %

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