CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 105,343	$ 90,092
Short-term marketable securities	96,891	83,769
Accounts receivable, net of allowances of $511 and $318 in 2016 and 2015, respectively	14,010	7,818
Inventories	46,749	51,934
Prepaid expenses and other current assets	6,478	6,790
Total current assets	269,471	240,403
PROPERTY AND EQUIPMENT, net	95,746	99,381
INTANGIBLE ASSETS, net	34,726	38,165
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	11,342	11,843
OTHER ASSETS	6,372	5,896
Total assets	509,506	487,537
CURRENT LIABILITIES:
Accounts payable	24,367	21,660
Accrued payroll and related expenses	10,463	9,327
Taxes payable	247	3,620
Deferred income on sales to distributors	16,888	15,101
Other accrued liabilities	2,548	2,285
Total current liabilities	54,513	51,993
LONG-TERM INCOME TAXES PAYABLE	2,666	2,511
DEFERRED TAX LIABILITIES	1,004	1,291
OTHER LIABILITIES	3,315	3,123
Total liabilities	61,498	58,918
COMMITMENTS AND CONTINGENCIES (Notes 11, 12 and 13)
STOCKHOLDERS’ EQUITY:
Common stock	28	28
Additional paid-in capital	151,806	145,366
Accumulated other comprehensive loss	(1,527)	(1,851)
Retained earnings	297,701	285,076
Total stockholders’ equity	448,008	428,619
Total liabilities and stockholders’ equity	$ 509,506	$ 487,537