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Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Assets    
Cash and cash equivalents $ 27,104 $ 50,282
Restricted cash 7,625 3,286
Investments 53,636 64,115
Receivables from collaborations 2,342 6,117
Inventory 221
Prepaid expenses and other current assets 1,729 1,381
Deferred collaboration expense 12 210
Total current assets 92,669 125,391
Investments 33,744 41,295
Property and equipment, net 9,390 9,546
Other assets 841 2,027
Total assets 136,644 178,259
Liabilities and Stockholders’ Equity    
Accounts payable 4,122 6,337
Accrued expenses 19,409 12,699
Interest payable 14,832 12,095
Deferred collaboration revenue 300 8,484
Lease financing obligation 78 75
Senior credit facility 6,530 6,464
Non-recourse notes payable 28,902 28,682
Total current liabilities 74,173 74,836
Deferred rent 107 155
Lease financing obligation 2,711 2,751
Senior credit facility 13,469 16,750
Stockholders’ equity:    
Preferred stock, $0.001 par value; shares authorized — 5,000; no shares issued and outstanding
Common stock, $0.01 par value: shares authorized — 200,000; shares issued and outstanding — 98,928 in 2018 and 98,411 in 2017 989 984
Additional paid-in capital 720,587 714,869
Accumulated other comprehensive loss (452) (243)
Accumulated deficit (674,940) (631,843)
Total stockholders’ equity 46,184 83,767
Total liabilities and stockholders’ equity $ 136,644 $ 178,259