Note 6 - Inventories (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31
	2021			2020
Finished goods	$	10,451		$	6,328
Work-in-process		5,818			6,108
Raw materials		9,316			6,781
Provisions for obsolete inventories		(6,062	)		(6,629	)
Total	$	19,523		$	12,588

Provisions for Obsolete Inventories [Table Text Block]

	Years Ended December 31
	2021			2020			2019
Balance at beginning of year	$	6,629		$	6,632		$	6,597
Charge to cost and expenses		800			405			1,359
Other deductions		(1,367	)		(408	)		(1,324	)
Balance at end of year	$	6,062		$	6,629		$	6,632