XML 16 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Operating activities    
Net loss $ (7,652) $ (7,876)
Reconciliation of net loss to net cash used in operating activities:    
Depreciation and amortization 62 88
Stock-based compensation expense 479 505
Accretion of discount/premium on investment securities   25
Non-cash interest expense 20 50
Changes in assets and liabilities:    
Prepaid expenses and other current assets 205 (19)
Accounts payable 342 (468)
Accrued expenses (277) (454)
Deferred rent 2 44
Net cash used in operating activities (6,819) (8,105)
Investing activities    
Sales and maturities of available-for-sale securities   14,910
Purchases of property and equipment   (9)
Net cash provided by investing activities   14,901
Financing activities    
Proceeds from at-the-market offering, net of issuance costs 8,313 2,215
Proceeds from exercise of common stock options and warrants   21
Payments on borrowing (833) (833)
Net cash provided by financing activities 7,480 1,403
Net increase in cash, cash equivalents and restricted cash 661 8,199
Cash, cash equivalents and restricted cash, beginning of period 16,482 23,709
Cash, cash equivalents and restricted cash, end of period 17,143 31,908
Supplemental disclosure of cash flow information    
Cash paid for interest $ 42 104
Non-cash financing activities    
Fixed asset purchases included in accounts payable   $ 5