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Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 73,311 $ 49,060
Investments in marketable securities 465,641 309,502
Accounts receivable 15,077 9,464
Inventories 7,769 4,623
Prepaid expenses and other current assets 14,432 19,316
Total current assets 576,230 391,965
Investments in marketable securities 13,836 0
Property and equipment, less accumulated depreciation of $14,415 and $12,515 at June 30, 2018 and December 31, 2017, respectively 9,111 9,062
In-process research & development 23,000 23,000
Goodwill 197,797 197,797
Other non-current assets 5,915 5,200
Total Assets 825,889 627,024
Current liabilities:    
Accounts payable, accrued expenses, and other current liabilities 41,613 53,890
Deferred reimbursements 2,750 7,750
Contingent consideration payable 8,600 8,400
Total current liabilities 52,963 70,040
Deferred reimbursements 14,156 14,156
Convertible notes 169,440 164,167
Contingent consideration payable 18,200 17,000
Deferred income taxes 6,465 6,465
Other non-current liability 2,770 2,346
Total liabilities 263,994 274,174
Commitments and contingencies
Stockholders’ equity:    
Common stock, $0.01 par value, 500,000,000 and 250,000,000 shares authorized, 189,053,214 and 166,989,790 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively 1,939 1,721
Additional paid-in capital 1,723,865 1,400,758
Accumulated other comprehensive loss:    
Foreign currency translation adjustment (1,539) (1,659)
Unrealized gain on available-for-sale securities (455) (436)
Warrants 13,063 16,076
Accumulated deficit (1,174,978) (1,063,610)
Total stockholders’ equity 561,895 352,850
Total Liabilities and Stockholders’ Equity $ 825,889 $ 627,024