Note 3 - Supplemental Balance Sheet Information (in Thousands) - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property and equipment	$ 23,234	$ 21,635
Less accumulated depreciation and amortization	(20,305)	(18,840)
Property and equipment, net	2,929	2,795
Equipment [Member]
Property and equipment	4,741	4,322
Furniture and Fixtures [Member]
Property and equipment	2,319	2,307
Leaseholds and Leasehold Improvements [Member]
Property and equipment	351	326
Software Development [Member]
Property and equipment	$ 15,823	$ 14,680

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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