Note 2 - Revenue - Net Sales by Product and Service (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net sales	$ 7,603	$ 9,813	$ 16,809	$ 20,550
Less: sales returns	(36)	(45)	(125)	(117)
Product [Member]
Net sales	7,429	9,596	16,449	20,128
Administrative Fees, Freight and Other [Member]
Net sales	$ 210	$ 262	$ 485	$ 539

Amount, excluding 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