Note 13 - Revenue - Revenues by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2021		Sep. 30, 2020		Sep. 30, 2021		Sep. 30, 2020
Total revenue	$ 33,800	[1]	$ 11,279	[2]	$ 81,851	[2]	$ 33,361	[2]
Product, Freezer and Thaw [Member]
Total revenue	17,610		3,371		40,021		9,237
Product, Cell Processing [Member]
Total revenue	11,505		7,414		30,131		22,753
Product, Storage and Cold Chain Services [Member]
Total revenue	86		19		293		30
Service, Storage and Cold Chain Services [Member]
Total revenue	2,250		0		6,417		0
Rental, Storage and Cold Chain Services [Member]
Total revenue	$ 2,349		$ 475		$ 4,989		$ 1,341

[1] 2020 revenue includes service revenue related to SciSafe from October 1, 2020 through December 31, 2020.

[2] 2019 revenue includes automated thawing revenue related to Astero from April 1, 2019 through December 31, 2019; evo shipper rental revenue related to SAVSU from August 8, 2019 through December 31, 2019; and freezer and accessory revenue related to CBS from November 12, 2019 through December 31, 2019.