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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Revenue        
Product and license $ 34,472 $ 45,804 $ 66,032 $ 84,535
Services and other 11,222 8,489 21,626 16,525
Total revenue 45,694 54,293 87,658 101,060
Cost of goods sold        
Product and license 11,045 15,714 20,585 28,525
Services and other 2,601 2,028 5,113 3,881
Total cost of goods sold 13,646 17,742 25,698 32,406
Gross profit 32,048 36,551 61,960 68,654
Operating costs        
Sales and marketing 15,339 15,659 29,043 28,528
Research and development 6,320 6,242 12,176 11,807
General and administrative 8,588 9,062 16,441 17,392
Amortization of purchased intangible assets 2,201 2,202 4,399 4,427
Total operating costs 32,448 33,165 62,059 62,154
Operating income (loss) (400) 3,386 (99) 6,500
Interest income, net 340 166 630 275
Other income, net 373 252 588 614
Income before income taxes 313 3,804 1,119 7,389
Provision for income taxes 203 979 436 2,365
Net income $ 110 $ 2,825 $ 683 $ 5,024
Basic income per share $ 0.00 $ 0.07 $ 0.02 $ 0.13
Diluted income per share $ 0.00 $ 0.07 $ 0.02 $ 0.13
Weighted average common shares outstanding:        
Basic 39,797 39,710 39,783 39,695
Diluted 39,842 39,769 39,843 39,762