Note 5 - Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Inventory, Current [Table Text Block]

	As of December 31,
	2014		2013
Raw materials	$	7,298	$	12,453
Work in process		18,950		14,152
Finished goods		14,670		13,132
Total	$	40,918	$	39,737

Property, Plant and Equipment [Table Text Block]

	As of December 31,
	2014			2013
Production equipment and software	$	88,929		$	83,075
Buildings and improvements		29,386			29,342
Land		5,600			5,600
Transportation equipment		4,694			976
Furniture and fixtures		2,883			2,681
Leasehold improvements		2,350			2,150
Property and equipment, gross		133,842			123,824
Less: accumulated depreciation and amortization		(70,900	)		(58,987	)
Total	$	62,942		$	64,837

Schedule of Other Assets, Noncurrent [Table Text Block]

	As of December 31,
	2014		2013
Deferred compensation plan assets	$	6,084	$	607
Prepaid expense		1,418		57
Other		955		980
Total	$	8,457	$	1,644

Schedule of Accrued Liabilities [Table Text Block]

	As of December 31,
	2014		2013
Deferred proceeds from litigation	$	-	$	9,489
Dividends and dividend equivalents		6,080		-
Deferred revenue and customer prepayments		3,908		2,523
Stock rotation reserve		1,757		1,459
Commissions		767		931
Sales rebate		586		900
Warranty		240		451
Other		1,365		1,623
Total	$	14,703	$	17,376

Schedule of Other Assets and Other Liabilities [Table Text Block]

	As of December 31,
	2014		2013
Deferred compensation plan liabilities	$	6,177	$	628
Contingent consideration		2,507		-
Dividend equivalents		580		-
Other		940		850
Total	$	10,204	$	1,478