Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Statements of Cash Flows

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Unaudited Condensed Statements of Cash Flows - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash flows from operating activities:    
Net loss $ (14,410) $ (17,470)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 19 40
Stock-based compensation expense 1,351 1,241
(Accretion)/amortization of investment discount/premium (119) 151
Amortization of debt discount 314 300
Change in fair value of warrant liabilities (7,611) (2,809)
Changes in deferred rent (4) (7)
Deferred offering costs write off 230 0
Changes in operating assets and liabilities:    
Prepaid expenses, other assets, and deferred costs 323 (743)
Accounts payable and accrued expenses (2,165) 92
Deferred revenue (193) (193)
Net cash used in operating activities (22,265) (19,398)
Cash flows from investing activities:    
Maturities of investments 61,042 45,377
Purchases of property and equipment (477) (2)
Purchase of investments (61,963) (61,558)
Net cash used in investing activities (1,398) (16,183)
Cash flows from financing activities:    
Proceeds from common stock issued 30,699 8,926
Payments of offering costs and underwriting discounts and commissions (2,136) (288)
Proceeds from employee stock purchase plan issuance 39 36
Net cash provided by financing activities 28,602 8,674
Net increase (decrease) in cash, cash equivalents, and restricted cash 4,939 (26,907)
Cash, cash equivalents, and restricted cash at beginning of period 11,469 35,656
Cash, cash equivalents, and restricted cash at end of period 16,408 8,749
Supplemental cash flow information:    
Cash paid for interest 1,176 1,081
Cash received for interest 601 393
Noncash financing and investing activities:    
Deferred offering costs reclassified to additional-paid-in capital $ 84 $ 27