Note 1 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding - January 1, 2021		362,640		$	3.96
Granted		-			-
Exercised		(1,000	)		3.70
Cancelled		(6,140	)		3.40
Outstanding - March 31, 2021		355,500		$	3.97		7.52	$	821
Exercisable - March 31, 2021		173,700		$	3.77		6.99	$	437

Schedule of Inventory, Current [Table Text Block]

	March 31,			December 31,
	2021			2020
Raw Materials	$	17,235		$	14,865
Work in Process		1,143			969
Finished Goods		465			242
Reserves		(1,764	)		(2,159	)
Total	$	17,079		$	13,917

Schedule of Finite-Lived Intangible Assets [Table Text Block]

			March 31, 2021
			Gross
			Carrying		Accumulated		Net Book
	Years		Amount		Amortization		Value
Customer Relationships		9	$	1,302	$	832	$	470
Intellectual Property		3		100		100		-
Trade Names		20		814		234		580
Patents		7		122		-		122
Totals			$	2,338	$	1,166	$	1,172

			December 31, 2020
			Gross
			Carrying		Accumulated		Net Book
	Years		Amount		Amortization		Value
Customer Relationships		9	$	1,302	$	795	$	507
Intellectual Property		3		100		100		-
Trade Names		20		814		225		589
Patents		7		77		-		77
Totals			$	2,293	$	1,120	$	1,173

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year	Amount
Remainder of 2021	$	139
2022		185
2023		185
2024		113
2025		41
Thereafter		387
Total	$	1,050