BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 40,435 $ 24,248
Trade receivables 6,221 3,334
Inventory 1,682 1,207
Prepaid expenses and other current assets 642 1,441
Total current assets 48,980 30,230
Strategic inventory 2,800 4,090
Property and equipment, net of accumulated depreciation 98 236
Other assets 59 74
Total assets 51,937 34,630
Current liabilities:    
Accounts payable 1,325 1,886
Accrued clinical expenses 1,171 336
Other accrued liabilities 3,257 1,876
Long-term obligation-current portion 14,965 9,424
Deferred revenue 158 33
Total current liabilities 20,876 13,555
Long-term obligation, net of current portion $ 12,563 $ 24,463
Commitments
Stockholders' equity (deficit):    
Preferred stock, $0.001 par value, 10,000 shares authorized and no shares outstanding at December 31, 2015 and 2014
Common stock, $0.001 par value, 280,000 shares authorized and 109,642 and 101,395 shares issued and outstanding at December 31, 2015 and 2014, respectively $ 110 $ 101
Additional paid-in capital 348,796 320,511
Accumulated deficit (330,408) (324,000)
Total stockholders’ equity (deficit) 18,498 (3,388)
Total liabilities and stockholders' equity (deficit) $ 51,937 $ 34,630