CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 94,735	$ 90,092
Short-term marketable securities	90,419	83,769
Accounts receivable, net of allowances of $407 and $318 in 2016 and 2015, respectively	11,294	7,818
Inventories	45,665	51,934
Prepaid expenses and other current assets	7,295	6,790
Total current assets	249,408	240,403
PROPERTY AND EQUIPMENT, net	97,723	99,381
INTANGIBLE ASSETS, net	36,373	38,165
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	11,779	11,843
OTHER ASSETS	5,664	5,896
Total assets	492,796	487,537
CURRENT LIABILITIES:
Accounts payable	19,862	21,660
Accrued payroll and related expenses	7,986	9,327
Taxes payable	3,326	3,620
Deferred income on sales to distributors	17,102	15,101
Other accrued liabilities	2,217	2,285
Total current liabilities	50,493	51,993
LONG-TERM INCOME TAXES PAYABLE	2,695	2,511
DEFERRED TAX LIABILITIES	1,141	1,291
OTHER LIABILITIES	3,246	3,123
Total liabilities	$ 57,575	$ 58,918
COMMITMENTS AND CONTINGENCIES (Notes 11, 12 and 13)
STOCKHOLDERS’ EQUITY:
Common stock	$ 28	$ 28
Additional paid-in capital	146,655	145,366
Accumulated other comprehensive loss	(1,652)	(1,851)
Retained earnings	290,190	285,076
Total stockholders’ equity	435,221	428,619
Total liabilities and stockholders’ equity	$ 492,796	$ 487,537