Note 3 - Balance Sheet Detail (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31,
	201 9		201 8
Raw materials	$	17,935	$	16,991
Work in process		2,016		2,306
Finished goods		13,970		8,717
Total	$	33,921	$	28,014

Property, Plant and Equipment [Table Text Block]

	December 31,
	201 9		201 8
Leasehold improvements	$	867	$	660
Office equipment and furniture		3,110		2,835
Machinery and equipment		7,805		7,304
		11,782		10,799
Less: Accumulated depreciation		(8,965)		(8,127)
Property and equipment, net	$	2,817	$	2,672

Schedule of Intangible Assets and Goodwill [Table Text Block]

	Gross Carrying Amount		Accumulated Amortization & Impairment Amount		Net Amount
December 31, 201 9
Patent sublicense	$	1,218	$	1,218	$	-
Customer relationship intangible related to acquisition		2,510		2,510		-
Other identified intangible assets related to acquisition		780		780		-
Other intangible		155		155		-
Goodwill		1,339		-		1,339
Total	$	6,002	$	4,663	$	1,339
December 31, 2018
Patent sublicense	$	1,218	$	1,218	$	-
Customer relationship intangible related to acquisition		2,510		2,510		-
Other identified intangible assets related to acquisition		780		780		-
Other intangible		155		155		-
Goodwill		1,339		-		1,339
Total	$	6,002	$	4,663	$	1,339

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	201 9		201 8
Accrued payroll and related expenses	$	14,341	$	9,377
Sales and marketing accruals		2,527		2,379
Accrued sales tax		3,922		2,935
Warranty liability		4,401		4,666
Other accrued liabilities		5,116		3,943
Total	$	30,307	$	23,300