Note 13 - Revenue - Revenues by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Total revenue	$ 40,747	$ 33,800	$ 117,500	$ 81,851
Product, Freezer and Thaw [Member]
Total revenue	15,326	17,610	49,331	40,021
Product, Cell Processing [Member]
Total revenue	18,082	11,505	48,336	30,131
Storage and Storage Services Product Revenue [Member]
Total revenue	260	86	560	293
Storage and Storage Services [Member]
Total revenue	4,312	2,250	11,099	6,417
Services, Cell Processing [Member]
Total revenue	18	0	18	0
Storage and Storage Services Rental Revenue [Member]
Total revenue	$ 2,749	$ 2,349	$ 8,156	$ 4,989