CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
REVENUE:    
Product sales $ 79,367 $ 73,695
Services and other 9,350 9,276
Total revenue 88,717 82,971
COSTS AND EXPENSES:    
Cost of product sales 27,583 29,512
Cost of services and other 6,296 6,904
Research and development 12,120 11,635
Selling, general and administrative 35,433 38,562
Litigation settlement 0 5,100
Total costs and expenses 81,432 91,713
Income (loss) from operations 7,285 (8,742)
Other (expense) income, net (673) 293
Interest expense 1,483 1,753
Income (loss) before income taxes 5,129 (10,202)
Income tax provision 743 272
Net income (loss) $ 4,386 $ (10,474)
Basic net income (loss) per common share $ 0.06 $ (0.14)
Diluted net income (loss) per common share $ 0.06 $ (0.14)
Shares used in computing basic net income (loss) per common share 75,408 72,498
Shares used in computing diluted net income (loss) per common share 78,754 72,498