Note 1 - Organization and Significant Accounting Policies - Concentrations Risk by Geographic Locations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Long-Lived Assets	$ 48,266	$ 46,611
UNITED STATES
Long-Lived Assets	42,829	40,708
NETHERLANDS
Long-Lived Assets	$ 5,437	$ 5,903
Revenue Benchmark [Member] | Product Concentration Risk [Member] | CryoStor Products [Member]
Revenue	36.00%	33.00%	60.00%
Revenue Benchmark [Member] | Product Concentration Risk [Member] | 780XLE Freezer Line [Member]
Revenue	22.00%	22.00%	0.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Revenue	72.00%	78.00%	73.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | CANADA
Revenue	17.00%	7.00%	13.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | EMEA [Member]
Revenue	7.00%	14.00%	12.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Geographic, Other [Member]
Revenue	4.00%	1.00%	2.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | All Location [Member]
Revenue	100.00%	100.00%	100.00%