Note 1 - Organization and Significant Accounting Policies - Revenues By Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	[1]	Dec. 31, 2020	[2]
Total revenue	$ 161,759	$ 119,156		$ 48,087
Product, Freezer and Thaw [Member]
Total revenue	66,682	56,620		13,548
Product, Cell Processing [Member]
Total revenue	68,509	44,965		30,946
Product, Storage and Cold Chain Services [Member]
Total revenue	809	328		46
Service, Freezer and Thaw [Member]
Total revenue	74	0		0
Service, Storage and Cold Chain Services [Member]
Total revenue	15,234	9,817		1,752
Rental, Storage and Cold Chain Services [Member]
Total revenue	$ 10,451	$ 7,426		$ 1,795

[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.