Note 5 - Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2019		2018
Raw materials	$	22,872	$	43,017
Work in process		42,681		38,674
Finished goods		61,947		54,693
Total	$	127,500	$	136,384

Schedule of Other Current Assets [Table Text Block]

	December 31,
	2019		2018
RSU tax withholding proceeds receivable	$	6,106	$	39
Prepaid expense		7,991		3,425
Interest receivable		2,490		1,441
Assets for product returns		1,585		1,602
Prepaid wafer refund receivable		-		4,297
Other		1,433		1,127
Total	$	19,605	$	11,931

Property, Plant and Equipment [Table Text Block]

	December 31,
	2019			2018
Production equipment and software	$	134,420		$	120,645
Buildings and improvements		149,443			100,135
Land		35,040			16,724
Transportation equipment		16,510			12,948
Leasehold improvements		7,173			4,755
Furniture and fixtures		4,660			4,341
Property and equipment		347,246			259,548
Less: accumulated depreciation and amortization		(118,931	)		(109,547	)
Property and equipment, net	$	228,315		$	150,001

Schedule of Other Assets, Noncurrent [Table Text Block]

	December 31,
	2019		2018
Deferred compensation plan assets	$	38,858	$	31,970
Operating lease ROU assets		2,863		-
Prepaid expense		2,687		2,713
Other		1,544		1,296
Total	$	45,952	$	35,979

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2019		2018
Dividends and dividend equivalents	$	21,747	$	15,044
Stock rotation and sales returns		5,530		5,363
Customer prepayments		3,412		2,520
Income tax payable		2,435		7,018
Commissions		1,425		1,369
Operating lease liabilities		1,254		-
Warranty		1,139		4,564
Other		7,848		3,084
Total	$	44,790	$	38,962

Other Noncurrent Liabilities [Table Text Block]

	December 31,
	2019		2018
Deferred compensation plan liabilities	$	39,665	$	32,283
Dividend equivalents		6,265		6,145
Operating lease liabilities		1,103		-
Other		30		97
Total	$	47,063	$	38,525