Note 12 - Revenue - Revenues by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Total revenue	$ 12,162	$ 5,770
Biopreservation Media [Member]
Total revenue	8,672	5,770
Automated Thawing Products [Member]
Total revenue	394
Evo Shippers [Member]
Total revenue	438
Freezers and Accessories [Member]
Total revenue	$ 2,658

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details