Note 1 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2023

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, 2023		452,700		$	5.97
Granted		-			-
Exercised		(10,000	)		3.43
Cancelled		(1,600	)		7.18
Outstanding - March 31, 2023		441,100		$	6.02		6.68	$	2,100
Exercisable - March 31, 2023		247,700		$	4.38		5.72	$	1,556

Schedule of Inventory, Current [Table Text Block]

	March 31,			December 31,
	2023			2022
Raw Materials	$	20,983		$	21,673
Work in Process		865			1,238
Finished Goods		672			671
Reserves		(1,176	)		(1,144	)
Total	$	21,344		$	22,438

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

	Customer Relationships		Patents		Total
Balance at January 1, 2022	$	360	$	141	$	501
Additions		-		71		71
Amortization		144		6		150
Balance at December 31, 2022		216		206		422
Amortization		36		4		40
Balance at March 31, 2023	$	180	$	202	$	382

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

Year	Amount
Remainder of 2023	$	119
2024		87
2025		14
2026		14
Thereafter		37
Total	$	271

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

Condensed Consolidated Statements of Cash Flows
	March 31, 2022
CASH FLOWS FROM FINANCING ACTIVITIES	As reported			Adjustment			As revised
Net Proceeds from Line of Credit		(1,434	)		1,434			-
Proceeds from Line of Credit		-			26,986			26,986
Payments to Line of Credit		-			(28,420	)		(28,420	)
Principal Payments on Long-Term Debt		-						-
Principal Payments on Financing Leases		(184	)					(184	)
Stock Option Exercises		33						33
Net Cash Provided by Financing Activities		(1,585	)		-			(1,585	)