Note 3 - Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	March 31,			December 31,
	2020			2019
Computer equipment	$	10,893		$	10,880
Software		4,685			4,690
Furniture, fixtures and equipment		2,419			2,395
Leasehold improvements		6,087			6,095
Laboratory and other equipment		4,974			4,933
Test equipment		23,604			22,980
Construction-in-progress		19,377			18,245
		72,039			70,218
Less: accumulated depreciation and amortization		(31,030	)		(29,420	)
Total	$	41,009		$	40,798

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

		March 31, 2020							December 31, 2019
	Amortization	Gross					Net		Gross					Net
	Period	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	(Years)	Amount		Amortization			Amount		Amount		Amortization			Amount
Acquired identifiable intangibles:
Customer relationships	1 ‒ 9	$	7,440	$	(5,047	)	$	2,393	$	7,440	$	(4,935	)	$	2,505
Developed technology	4 ‒ 9		17,460		(14,290	)		3,170		17,460		(14,101	)		3,359
Tradename	2 ‒ 7		790		(679	)		111		790		(673	)		117
Patent	7 ‒ 10		1,800		(1,570	)		230		1,800		(1,560	)		240
Total		$	27,490	$	(21,586	)	$	5,904	$	27,490	$	(21,269	)	$	6,221

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

Year Ending December 31,	Amount
2020 (remaining nine months)	$	952
2021		1,093
2022		886
2023		886
2024		747
2025 and thereafter		1,340
Total future amortization expense	$	5,904