Note 1 - Organization and Significant Accounting Policies - Revenues By Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	[1]	Dec. 31, 2020	[2]	Dec. 31, 2019	[3]
Total revenue	$ 119,156		$ 48,087		$ 27,371
Product, Freezer and Thaw [Member]
Total revenue	56,620		13,548		3,312
Product, Cell Processing [Member]
Total revenue	44,965		30,946		23,367
Product, Storage and Cold Chain Services [Member]
Total revenue	328		46		165
Service, Storage and Cold Chain Services [Member]
Total revenue	9,817		1,752		0
Rental, Storage and Cold Chain Services [Member]
Total revenue	$ 7,426		$ 1,795		$ 527

[1] 2021 revenue includes product revenue related to Global Cooling from May 3, 2021 through December 31, 2021 and product revenue related to Sexton from September 1, 2021 through December 31, 2021.

[2] 2020 revenue includes service revenue related to SciSafe from October 1, 2020 through December 31, 2020.

[3] 2019 revenue includes product revenue related to Astero Bio Corporation ("Astero") from April 1, 2019 through December 31, 2019; rental revenue related to SAVSU from August 8, 2019 through December 31, 2019; and product revenue related to CBS from November 12, 2019 through December 31, 2019.