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Note 1 - Organization and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2021 |  |  | 2022 |  |  | 2023 |  |  | 2024 |  |  | Total |
Service revenue |  | $ | 3,342 |  |  | $ | 1,170 |  |  | $ | 31 |  |  | $ | 10 |  |  | $ | 4,553 |
Revenues By Product Line [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020⁽¹⁾ |  |  | 2019⁽²⁾ |
Biopreservation media |  | $ | 30,946 |  |  | $ | 23,358 |
Automated thawing |  |  | 1,709 |  |  |  | 1,184 |
Cold chain management |  |  | 46 |  |  |  | 165 |
Freezers and accessories |  |  | 11,839 |  |  |  | 2,137 |
Total product revenue |  |  | 44,540 |  |  |  | 26,844 |
Cold chain management |  |  | 1,795 |  |  |  | 527 |
Total rental revenue |  |  | 1,795 |  |  |  | 527 |
Biological and pharmaceutical storage |  |  | 1,752 |  |  |  | - |
Total storage revenue |  |  | 1,752 |  |  |  | - |
Total revenue |  | $ | 48,087 |  |  | $ | 27,371 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year Ended December 31, |
(In thousands, except share and earnings per share data) |  | 2020 |  |  | 2019 |
Basic earnings (loss) per common share |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 2,667 |  |  | $ | (1,657 | )
Amount attributable to unvested restricted shares |  |  | (135 | ) |  |  | - |
Amount attributable to warrants outstanding |  |  | (82 | ) |  |  | - |
Net income (loss) allocated to common shareholders |  |  | 2,450 |  |  |  | (1,657 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average common shares issued and outstanding |  |  | 27,306,258 |  |  |  | 19,460,299 |
Basic earnings (loss) per common share |  |  | 0.09 |  |  |  | (0.09 | )
Diluted earnings (loss) per common share |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |
Net income (loss) |  |  | 2,667 |  |  |  | (1,657 | )
Amount attributable to warrants |  |  | (20 | ) |  |  | - |
Less: gain related to change in fair value of warrants |  |  | (3,601 | ) |  |  | - |
Diluted loss allocated to common shareholders |  |  | (954 | ) |  |  | (1,657 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average common shares issued and outstanding |  |  | 27,306,258 |  |  |  | 19,460,299 |
Diluted loss per common share |  | $ | (0.03 | ) |  | $ | (0.09 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Stock options and restricted stock awards |  |  | 2,131,794 |  |  |  | 2,564,456 |
Warrants |  |  | 1,499,953 |  |  |  | 2,956,039 |
Total |  |  | 3,631,747 |  |  |  | 5,520,495 |
Schedule of Cash and Cash Equivalents [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |
Cash and cash equivalents |  | $ | 90,403 |  |  | $ | 6,448 |
Restricted cash |  |  | 53 |  |  |  | - |
Total cash, cash equivalents, and restricted cash |  | $ | 90,456 |  |  | $ | 6,448 |
Revenue from External Customers by Products and Services [Table Text Block] |
|  | Year Ended December 31, |
Revenue by customers’ geographic locations |  | 2020 |  |  | 2019 |
United States |  |  | 73 | % |  |  | 69 | %
Canada |  |  | 13 | % |  |  | 16 | %
Europe, Middle East, Africa (EMEA) |  |  | 12 | % |  |  | 14 | %
Other |  |  | 2 | % |  |  | 1 | %
Total revenue |  |  | 100 | % |  |  | 100 | %
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
|  | Year Ended December 31, |
|  | 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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