Note 13 - Revenue - Revenues by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total revenue	$ 40,533	$ 31,204	$ 76,752	$ 48,051
Product, Freezer and Thaw [Member]
Total revenue	18,670	17,564	34,005	22,411
Product, Cell Processing [Member]
Total revenue	15,356	9,699	30,254	18,626
Storage and Storage Services Product Revenue [Member]
Total revenue	144	205	299	207
Storage and Storage Services Service Revenue [Member]
Total revenue	3,698	1,963	6,787	4,167
Storage and Storage Services Rental Revenue [Member]
Total revenue	$ 2,665	$ 1,773	$ 5,407	$ 2,640