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CONSLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
REVENUE:    
Material sales $ 12,752 $ 10,529
Royalty and license fees 1,299 422
Technology development and support revenue 925 1,669
Total revenue 14,976 12,620
OPERATING EXPENSES:    
Cost of material sales 3,092 1,088
Research and development 8,938 6,661
Selling, general and administrative 5,171 4,311
Patent costs and amortization of acquired technology 4,617 1,868
Royalty and license expense 312 250
Total operating expenses 22,130 14,178
Operating loss (7,154) (1,558)
INTEREST INCOME 210 357
INTEREST EXPENSE (8) (20)
LOSS BEFORE INCOME TAXES (6,952) (1,221)
INCOME TAX BENEFIT 2,194 0
NET LOSS $ (4,758) $ (1,221)
NET LOSS PER COMMON SHARE:    
BASIC (in dollars per share) $ (0.10) $ (0.03)
DILUTED (in dollars per share) $ (0.10) $ (0.03)
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET LOSS PER COMMON SHARE:    
BASIC (in shares) 45,823,414 45,749,072
DILUTED (in shares) 45,823,414 45,749,072