CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
REVENUE:
Material sales	$ 35,327	$ 12,752
Royalty and license fees	1,779	1,299
Technology development and support revenue	733	925
Total revenue	37,839	14,976
OPERATING EXPENSES:
Cost of material sales	9,897	3,092
Research and development	10,156	8,938
Selling, general and administrative	6,430	5,171
Patent costs and amortization of acquired technology	3,972	4,617
Royalty and license expense	756	312
Total operating expenses	31,211	22,130
Operating income (loss)	6,628	(7,154)
INTEREST INCOME	218	210
INTEREST EXPENSE	(17)	(8)
INCOME (LOSS) BEFORE INCOME TAXES	6,829	(6,952)
INCOME TAX (EXPENSE) BENEFIT	(2,807)	2,194
NET INCOME (LOSS)	$ 4,022	$ (4,758)
NET INCOME (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ 0.09	$ (0.10)
Diluted (in dollars per share)	$ 0.09	$ (0.10)
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME (LOSS) PER COMMON SHARE:
Weighted average common shares outstanding - Basic (in shares)	46,177,661	45,823,414
Weighted average common shares outstanding - Diluted (in shares)	46,651,438	45,823,414