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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 79,749 $ 49,060
Investments in marketable securities 424,403 309,502
Accounts receivable 21,962 9,464
Inventories 8,390 4,623
Prepaid expenses and other current assets 16,592 19,316
Total current assets 551,096 391,965
Property and equipment, less accumulated depreciation of $15,671 and $12,515 at December 31, 2018 and 2017, respectively 11,375 9,062
In-process research & development 23,000 23,000
Goodwill 197,797 197,797
Other non-current assets 6,683 5,200
Total Assets 789,951 627,024
Current liabilities:    
Accounts payable, accrued expenses, and other current liabilities 80,625 53,890
Deferred reimbursements 5,500 7,750
Contingent consideration payable 0 8,400
Total current liabilities 86,125 70,040
Deferred reimbursements 10,156 14,156
Convertible notes 175,006 164,167
Senior secured term loan 146,734 0
Contingent consideration payable 19,700 17,000
Deferred income taxes 6,465 6,465
Other non-current liabilities 2,853 2,346
Total Liabilities 447,039 274,174
Commitments and contingencies
Stockholders' equity:    
Common stock, $.01 par value, 500,000,000 shares authorized, 189,383,924 shares issued and outstanding at December 31, 2018 Common stock, $.01 par value, 250,000,000 shares authorized, 166,989,790 shares issued and outstanding at December 31, 2017 1,942 1,721
Additional paid-in capital 1,740,061 1,400,758
Accumulated other comprehensive loss:    
Foreign currency translation adjustment 495 (1,659)
Unrealized loss on available-for securities (427) (436)
Warrants 13,063 16,076
Accumulated deficit (1,412,222) (1,063,610)
Total stockholders' equity 342,912 352,850
Total Liabilities and Stockholders' Equity $ 789,951 $ 627,024