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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 30,277 $ 13,414
Short-term investments 78,986 37,724
Accounts receivable, net 18,616 1,960
Inventory 4,801 5,340
Prepaid expenses and other current assets 3,673 3,705
Total current assets 136,353 62,143
Property and equipment, net 5,754 5,076
Other assets 263 263
Total assets 142,370 67,482
Current liabilities:    
Accounts payable 6,315 6,814
Accrued clinical liabilities 14,416 13,207
Accrued payroll and employee liabilities 7,258 8,414
Other accrued liabilities 12,233 6,288
Deferred revenue 4,788 1,099
Convertible notes payable to related parties, net of discount 3,285 2,911
Total current liabilities 48,295 38,733
Notes Payable, Related Parties, Noncurrent 25,000 50,000
Total liabilities 73,295 88,733
Stockholders’ equity (deficit):    
Common stock 539 394
Additional paid-in capital 747,641 564,343
Accumulated other comprehensive loss (6) (17)
Accumulated deficit (679,099) (585,971)
Total stockholders’ equity (deficit) 69,075 (21,251)
Total liabilities and stockholders’ equity (deficit) $ 142,370 $ 67,482