Note 8 - Long-lived Assets - Cost Basis and Estimated Lives of Property and Equipment from Continuing Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property and equipment, gross	$ 168,413	$ 167,197
Less accumulated depreciation and amortization	(122,841)	(120,074)
Total property and equipment	45,572	47,123
Land [Member]
Property and equipment, gross	1,423	1,423
Building [Member]
Property and equipment, gross	$ 22,719	22,111
Life (Year)	39 years
Machinery and Equipment [Member]
Property and equipment, gross	$ 128,329	125,107
Machinery and Equipment [Member] | Minimum [Member]
Life (Year)	2 years
Machinery and Equipment [Member] | Maximum [Member]
Life (Year)	10 years
Office Equipment [Member]
Property and equipment, gross	$ 5,996	5,962
Office Equipment [Member] | Minimum [Member]
Life (Year)	3 years
Office Equipment [Member] | Maximum [Member]
Life (Year)	7 years
Leasehold Improvements [Member]
Property and equipment, gross	$ 9,110	9,068
Construction in Progress [Member]
Property and equipment, gross	$ 836	$ 3,526