Unaudited Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 61,854 $ 46,444
Available-for-sale investments 249,586 254,854
Accounts receivable, net of allowance of $101 and $67 32,522 30,988
Other receivables 1,404 3,295
Inventories 34,015 29,246
Prepaid expenses and other current assets, net 10,896 13,477
Total current assets 390,277 378,304
Property and equipment, net 16,011 15,942
Goodwill, net 304,658 304,658
Other intangible assets, net 161,635 168,919
Other long-term assets 4,525 4,891
Total assets 877,106 872,714
Current liabilities:    
Accounts payable 40,432 37,755
Accrued expenses and other current liabilities 27,999 21,505
Deferred revenue 7,096 7,884
Short-term portion of long-term debt, net 0 7,914
Total current liabilities 75,527 75,058
Long-term liabilities:    
Long-term debt, net 54,940 85,835
Convertible senior notes, net 186,117 185,177
Deferred tax liability, net 26,624 42,963
Deferred revenue 2,844 1,915
Other long-term liabilities 3,258 2,741
Total long-term liabilities 273,783 318,631
Total liabilities 349,310 393,689
Commitments and contingencies (Note 7)      
Stockholders’ equity:    
Common stock, par $0.0001—authorized shares, 900,000; issued and outstanding shares, 40,851 and 40,882 4 4
Additional paid-in capital 1,493,361 1,467,658
Accumulated deficit (964,424) (987,524)
Accumulated other comprehensive loss (1,145) (1,113)
Total stockholders’ equity 527,796 479,025
Total liabilities and stockholders’ equity $ 877,106 $ 872,714