Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
[1]
Operating activities:    
Net loss $ (8,547) $ (22,106)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 869 208
Right-of-use asset amortization 156 215
Stock-based compensation 2,520 2,742
Other non-cash transactions 343 (151)
Changes in operating assets and liabilities (20,250) (6,749)
Net cash used in operating activities (24,909) (25,841)
Investing activities:    
Purchases of property and equipment (2,988) (1,054)
Proceeds from maturity of investments 47,523 35,647
Purchases of investments (38,525) (26,997)
Net cash provided by investing activities 6,010 7,596
Financing activities:    
Proceeds from exercise of stock options 271 97
Proceeds from exercise of warrants 0 5
Proceeds from employee stock purchase plan 145 178
Net cash provided by financing activities 416 280
Effect of exchange rate change on cash and cash equivalents 525 (2,001)
Net decrease in cash and cash equivalents (17,958) (19,966)
Cash and cash equivalents at beginning of period 62,260 74,867
Cash and cash equivalents at end of period 44,302 54,901
Supplemental cash flow disclosures:    
Net unrealized gain on investments 31 93
Property and equipment included in accounts payable $ 329 $ 31
[1] (1) Restated to conform to ASC 842. See accompanying Note 2.