Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 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		27,000			6.14
Exercised		(13,400	)		3.43
Cancelled		(10,340	)		3.42
Outstanding - September 30, 2021		365,900		$	4.15		7.25	$	2,688
Exercisable - September 30, 2021		180,500		$	3.75		6.56	$	1,398

Schedule of Inventory, Current [Table Text Block]

	September 30,			December 31,
	2021			2020
Raw Materials	$	19,673		$	14,865
Work in Process		1,683			969
Finished Goods		485			242
Reserves		(1,199	)		(2,159	)
Total	$	20,643		$	13,917

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

	Customer Relationships			Trade Names			Patents		Total
Balance at January 1, 2020	$	651		$	631		$	56	$	1,338
Additions		-			-			20		20
Amortization		(144	)		(41	)		-		(185	)
Balance at December 31, 2020	$	507		$	590		$	76	$	1,173
Additions		-			-			50		50
Amortization		(109	)		(30	)		-		(139	)
Abandonment Loss		-			(560	)		-		(560	)
Balance at September 31, 2021	$	398		$	-		$	126	$	524

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

Year	Amount
Remainder of 2021	$	36
2022		145
2023		145
2024		72
Total	$	398

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30, 2020				September 30, 2020
	Previously Reported		After Reclassification		Previously Reported		After Reclassification
Cost of Goods Sold	$	24,717	$	24,400	$	73,171	$	72,336
General and Administrative Expenses		2,164		2,480		5,819		6,654