Note 4 - Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30,		December 31,
	2019		2018
Raw materials	$	42,278	$	43,017
Work in process		36,390		38,674
Finished goods		64,954		54,693
Total	$	143,622	$	136,384

Schedule of Other Current Assets [Table Text Block]

	June 30,		December 31,
	2019		2018
Asset held for sale	$	7,076	$	-
RSU tax withholding proceeds receivable		4,522		39
Prepaid expense		2,913		3,425
Interest receivable		1,516		1,441
Assets for product returns		1,274		1,602
Value-added tax receivable		590		423
Prepaid wafer refund receivable		-		4,297
Other		1,754		704
Total	$	19,645	$	11,931

Schedule of Other Assets, Noncurrent [Table Text Block]

	June 30,		December 31,
	2019		2018
Deferred compensation plan assets	$	35,961	$	31,970
Operating lease ROU assets		2,688		-
Prepaid expense		2,520		2,713
Other		1,506		1,296
Total	$	42,675	$	35,979

Schedule of Accrued Liabilities [Table Text Block]

	June 30,		December 31,
	2019		2018
Dividends and dividend equivalents	$	21,554	$	15,044
Stock rotation and sales returns		4,339		5,363
Customer prepayments		3,203		2,520
Income tax payable		2,359		7,018
Warranty		1,748		4,564
Operating lease liabilities		1,097		-
Commissions		945		1,369
Other		3,371		3,084
Total	$	38,616	$	38,962

Other Noncurrent Liabilities [Table Text Block]

	June 30,		December 31,
	2019		2018
Deferred compensation plan liabilities	$	36,594	$	32,283
Dividend equivalents		5,921		6,145
Operating lease liabilities		893		-
Other		29		97
Total	$	43,437	$	38,525