Note 3 - Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	September 30,			December 31,
(Dollars in thousands)	2018			2017
Computer equipment	$	10,446		$	10,729
Software		4,121			3,348
Furniture, fixtures and equipment		4,420			3,676
Leasehold improvements		5,573			1,980
Test equipment		14,694			13,796
Construction-in-progress		17,928			12,527
		57,182			46,056
Less: accumulated depreciation and amortization		(23,062	)		(20,670	)
Total	$	34,120		$	25,386

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

				September 30, 2018							December 31, 2017
	Amortization			Gross					Net		Gross					Net
	Period			Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
(Dollars in thousands)	(Years)			Amount		Amortization			Amount		Amount		Amortization			Amount
Customer relationships	1	-	9	$	6,740	$	(4,421	)	$	2,319	$	6,740	$	(4,145	)	$	2,595
Developed technology	4	-	6		15,820		(13,261	)		2,559		15,820		(12,829	)		2,991
Tradename	2	-	4		790		(641	)		149		790		(622	)		168
Patent	7	-	10		1800		(1,510	)		290		1,800		(1,480	)		320
Total				$	25,150	$	(19,833	)	$	5,317	$	25,150	$	(19,076	)	$	6,074

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

Year ending December 31,	Amount
2018 (remaining three months)	$	253
2019		1,009
2020		1,009
2021		833
2022		626
2023 and thereafter		1,587
Total future amortization expense	$	5,317