Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating activities    
Net loss $ (16,461) $ (14,463)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 517 388
Amortization of financing right-of-use asset 15  
Loss on disposal of fixed assets 1  
Stock-based compensation expense 1,879 1,696
Net amortization of premiums and discounts on marketable securities (296) (69)
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 158 (519)
Other long-term assets (14) 3
Accounts payable (610) (562)
Accrued expenses (4,966) (669)
Deferred revenue (454) 11,882
Operating lease asset and liabilities (96)  
Deferred rent and lease incentive   (87)
Net cash used in operating activities (20,327) (2,400)
Investing activities    
Purchases of property and equipment (591) (152)
Purchases of marketable securities (33,638) (2,486)
Maturities of marketable securities 30,000 15,000
Net cash (used in) provided by investing activities (4,229) 12,362
Financing activities    
Payments on financing and capital lease obligations (40) (44)
Proceeds from issuance of common stock through employee benefit plans 3 242
Proceeds from issuance of common stock in public offerings and private placements, net of issuance costs   51,969
Payment of offering costs (78)  
Net cash (used in) provided by financing activities (115) 52,167
(Decrease) increase in cash, cash equivalents and restricted cash (24,671) 62,129
Cash, cash equivalents and restricted cash, Beginning of period 50,814 32,688
Cash, cash equivalents and restricted cash, End of period 26,143 94,817
Supplemental disclosure of cash flow information:    
Cash paid for interest 8 1
Non-cash investing and financing activities    
Property and equipment received but unpaid as of period end 230 6
Assets acquired under financing lease 996  
Offering costs incurred but unpaid as of period end $ 129 $ 67