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Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Assets    
Cash and cash equivalents $ 34,804 $ 26,731
Restricted cash 2,394 1,544
Investments 72,753 77,736
Receivables from collaborations 5,002 4,293
Inventory 600 1,649
Prepaid expenses and other current assets 2,087 2,390
Deferred collaboration expense 9 9
Total current assets 117,649 114,352
Investments 11,655 22,376
Property and equipment, net 7,644 9,135
Other assets 5,390 978
Total assets 142,338 146,841
Liabilities and Stockholders’ Equity    
Accounts payable 6,935 7,769
Accrued expenses 16,547 15,938
Interest payable 13,392 11,848
Deferred collaboration revenue 221 221
Senior credit facility 4,580
Non-recourse notes payable 29,231 29,121
Total current liabilities 66,326 69,477
Deferred rent 54
Other non-current liabilities 3,889 2,703
Senior credit facility 49,616 25,372
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 — 110,270 in 2019 and 110,063 in 2018 1,103 1,101
Additional paid-in capital 784,278 780,400
Accumulated other comprehensive loss (89) (297)
Accumulated deficit (762,785) (731,969)
Total stockholders’ equity 22,507 49,235
Total liabilities and stockholders’ equity $ 142,338 $ 146,841