Note 5 - Balance Sheet Components

12 Months Ended

Dec. 31, 2015

Disclosure Text Block Supplement [Abstract]

Supplemental Balance Sheet Disclosures [Text Block]

5. BALANCE SHEET COMPONENTS

Inventories 

Inventories consist of the following (in thousands):

	December 31,
	2015		2014
Raw materials	$	14,907	$	7,298
Work in process		21,177		18,950
Finished goods		27,125		14,670
Total	$	63,209	$	40,918

Property and Equipment, Net

Property and equipment, net, consist of the following (in thousands):

	December 31,
	2015			2014
Production equipment and software	$	92,208		$	88,929
Buildings and improvements		34,736			29,386
Land		5,600			5,600
Transportation equipment		4,694			4,694
Furniture and fixtures		2,962			2,883
Leasehold improvements		2,283			2,350
Property and equipment, gross		142,483			133,842
Less: accumulated depreciation and amortization		(77,124	)		(70,900	)
Total	$	65,359		$	62,942

Depreciation and amortization expense was $12.0 million, $12.4 million and $12.1 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Other Long-Term Assets

Other long-term assets consist of the following (in thousands):

	December 31,
	2015		2014
Deferred compensation plan assets	$	13,985	$	6,084
Prepaid expense		1,257		1,418
Other		1,099		955
Total	$	16,341	$	8,457

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,
	2015		2014
Dividends and dividend equivalents	$	8,675	$	6,080
Deferred revenue and customer prepayments		5,236		3,908
Stock rotation reserve		2,372		1,757
Commissions		763		767
Income tax payable		465		-
Warranty		289		240
Sales rebate		268		586
Other		1,916		1,365
Total	$	19,984	$	14,703

Other Long-Term Liabilities

Other long-term liabilities consist of the following (in thousands):

	December 31,
	2015		2014
Deferred compensation plan liabilities	$	14,147	$	6,177
Dividend equivalents		2,019		580
Contingent consideration		-		2,507
Other		379		940
Total	$	16,545	$	10,204