Quarterly report pursuant to Section 13 or 15(d)

Statements of Cash Flows

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Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Operating activities:    
Net loss $ (11,947) $ (9,860)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 257 297
Stock-based compensation 1,657 1,547
Noncash interest expense on loans 8 218
Impairment of property and equipment   108
Revaluation of warrant liability 3 6
(Accretion) amortization of bond (discount) premium on marketable securities   (348)
Change in right-of-use asset 169  
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (765) (720)
Operating lease liabilities (293) (59)
Accounts payable, accrued expenses and other liabilities (628) (1,890)
Net cash used in operating activities (11,539) (10,701)
Investing activities:    
Maturities of marketable securities 3,500 40,179
Purchases of marketable securities   (41,362)
Net cash (used in) provided by investing activities 3,500 (1,183)
Financing activities:    
Proceeds from exercise of common stock options   21
Proceeds from issuance of common stock, net 35,580 9,243
Payment of employee withholding taxes on vested restricted stock units   (104)
Capital lease payments (5) (6)
Repayments of loans payable, net (5,045) (6,333)
Net cash (used in) provided by financing activities 30,530 2,821
Net increase (decrease) in cash, cash equivalents and restricted cash 22,491 (9,063)
Cash, cash equivalents and restricted cash-beginning of period 33,614 34,195
Cash, cash equivalents and restricted cash-end of period 56,105 25,132
Supplemental disclosure of cash flow information:    
Cash paid for interest $ 18 406
Fair value of common stock warrants issued to underwriters   $ 347