Note 1 - Organization and Significant Accounting Policies (Tables)

12 Months Ended

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	%