CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
REVENUE:
Material sales	$ 24,304	$ 26,818
Royalty and license fees	5,342	4,375
Technology development and support revenue	57	30
Total revenue	29,703	31,223
OPERATING EXPENSES:
Cost of material sales	5,052	8,581
Research and development	10,476	9,919
Selling, general and administrative	6,660	6,200
Patent costs and amortization of acquired technology	4,094	3,967
Royalty and license expense	875	785
Total operating expenses	27,157	29,452
Operating income	2,546	1,771
INTEREST INCOME	332	173
INTEREST EXPENSE	(8)	(12)
INCOME BEFORE INCOME TAXES	2,870	1,932
INCOME TAX EXPENSE	(921)	(618)
NET INCOME	$ 1,949	$ 1,314
NET INCOME PER COMMON SHARE:
Basic (in dollars per share)	$ 0.04	$ 0.03
Diluted (in dollars per share)	$ 0.04	$ 0.03
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER COMMON SHARE:
Weighted average common shares outstanding - Basic (in shares)	46,774,360	45,785,725
Weighted average common shares outstanding - Diluted (in shares)	46,907,558	46,214,247