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Consolidated Balance Sheets (unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Current assets:        
Cash and cash equivalents $ 97,675 $ 111,792 $ 54,106 $ 58,321
Marketable securities 80,595 79,454    
Trade receivables, net 45,611 40,394    
Inventory 12,355 10,754    
Prepaid expenses and other current assets 5,760 6,669    
Total current assets 241,996 249,063    
Fixed assets, net 8,302 8,376    
Intangible assets, net 127,565 132,993    
Deposits and other assets 1,548 1,221    
Total assets 379,411 391,653    
Current liabilities:        
Accounts payable and accrued expenses 71,437 76,446    
Deferred revenue 0 3,937    
Other current liabilities 1,279 1,665    
Total current liabilities 72,716 82,048    
Deferred revenue - long-term 9,300 7,954    
Long-term debt 146,878 144,971    
Other long-term liabilities 209 243    
Total liabilities 229,103 235,216    
Stockholders’ equity:        
Common stock, $0.001 par value. Authorized 125,000,000 shares; issued and outstanding 41,809,398 shares at March 31, 2018. Authorized 125,000,000 shares; issued and outstanding 41,612,395 shares at December 31, 2017 42 42    
Additional paid-in capital 975,418 966,534    
Accumulated other comprehensive income 4,953 3,969    
Accumulated deficit (830,105) (814,108)    
Total stockholders’ equity 150,308 156,437    
Total liabilities and stockholders’ equity $ 379,411 $ 391,653