Note 1 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

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, 2020		372,200		$	3.85
Granted		11,300			2.95
Exercised
Cancelled		(3,200	)		3.29
Outstanding - March 31, 2020		380,300		$	3.83		8.37	$	24,285
Exercisable - March 31, 2020		107,557		$	4.06		7.44	$	8,095

Schedule of Inventory, Current [Table Text Block]

	March 31,			December 31,
	2020			2019
Raw Materials	$	15,798		$	15,245
Work in Process		588			479
Finished Goods		556			41
Reserves		(1,579	)		(1,486	)
Total	$	15,363		$	14,279

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

			March 31, 2020
			Gross
			Carrying		Accumulated		Net Book
	Years		Amount		Amortization		Value
Customer Relationships		9	$	1,302	$	687	$	615
Intellectual Property		3		100		100		-
Trade Names		20		814		193		621
Patents		7		61		-		61
Totals			$	2,277	$	980	$	1,297

			December 31, 2019
			Gross
			Carrying		Accumulated		Net Book
	Years		Amount		Amortization		Value
Customer Relationships		9	$	1,302	$	651	$	651
Intellectual Property		3		100		95		5
Trade Names		20		814		183		631
Patents		7		56		-		56
Totals			$	2,272	$	929	$	1,343

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

Year	Amount
Remainder of 2020		139
2021		185
2022		185
2023		185
Thereafter		542
Total	$	1,236