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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
REVENUE: |  |  |  |
Material sales | $ 35,926 | $ 27,137 | $ 71,252 | $ 39,889
Royalty and license fees | 28,064 | 21,201 | 29,843 | 22,500
Technology development and support revenue | 137 | 1,021 | 870 | 1,946
Total revenue | 64,127 | 49,359 | 101,965 | 64,335
OPERATING EXPENSES: |  |  |  |
Cost of material sales | 11,951 | 8,282 | 21,848 | 11,374
Research and development | 10,544 | 7,316 | 20,700 | 16,254
Selling, general and administrative | 6,545 | 6,336 | 12,975 | 11,507
Patent costs and amortization of acquired technology | 4,748 | 4,522 | 8,721 | 9,139
Royalty and license expense | 1,501 | 1,172 | 2,257 | 1,484
Total operating expenses | 35,289 | 27,628 | 66,501 | 49,758
Operating income | 28,838 | 21,731 | 35,464 | 14,577
INTEREST INCOME | 193 | 178 | 411 | 388
INTEREST EXPENSE | (21) | (10) | (37) | (18)
INCOME BEFORE INCOME TAXES | 29,010 | 21,899 | 35,838 | 14,947
INCOME TAX EXPENSE | (8,588) | (6,517) | (11,395) | (4,323)
NET INCOME | $ 20,422 | $ 15,382 | $ 24,443 | $ 10,624
NET INCOME PER COMMON SHARE: |  |  |  |
Basic (in dollars per share) | $ 0.44 | $ 0.34 | $ 0.53 | $ 0.23
Diluted (in dollars per share) | $ 0.44 | $ 0.33 | $ 0.52 | $ 0.23
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER COMMON SHARE: |  |  |  |
Weighted average common shares outstanding - Basic (in shares) | 46,266,142 | 45,859,286 | 46,222,146 | 45,841,446
Weighted average common shares outstanding - Diluted (in shares) | 46,614,726 | 46,496,120 | 46,632,982 | 46,523,540

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