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Note 4 - Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Inventory, Current [Table Text Block]

Inventories:		March 31,				December 31,
(in thousands)		2021				2020
Finished goods		$	5,114			$	4,938
Work in process			3,544				3,513
Raw materials			14,018				13,811
Total		$	22,676			$	22,262

Other Current Liabilities [Table Text Block]

Current Liabilities:		March 31,				December 31,
(in thousands)		2021				2020
Compensation		$	2,711				3,715
Professional fees			432				432
Warranty costs			168				185
Customer related costs			1,010				1,093
Accrued income taxes			206				286
Other			2,108				1,767
Total		$	6,635			$	7,478

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