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
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities:    
Net loss $ (17,459) $ (13,259)
Reconciliation of net loss to net cash used in operating activities    
Depreciation 1,566 1,387
Amortization of intellectual property 95 75
Accretion of asset retirement obligation 21 10
Fair value of warrant modification, net 402
Stock-based compensation 492 467
Amortization of debt discount 597 107
Amortization of deferred financing costs 42 42
Non-cash convertible note interest expense 333 298
Impairment of acquired intellectual property 2,411
Inventory write down 130
Changes in operating assets and liabilities    
Accounts receivable 522 (593)
Inventory (138) (971)
Prepaid expenses and other current assets 552 (227)
Accounts payable 111 1,403
Accrued expenses 645 (68)
Deferred rent (93) (86)
Net cash used in operating activities (12,182) (9,004)
Cash flows from investing activities:    
Purchases of property and equipment (2,391) (5,558)
Intellectual property related expenditures (390)
Net cash used in investing activities (2,391) (5,948)
Cash flows from financing activities:    
Proceeds from issuance of common stock, net of transaction costs 28,754 10,630
Payments on notes payable (137) (83)
Payments on capital leases (78) (68)
Net cash provided by financing activities 28,539 10,479
Net increase (decrease) in cash, cash equivalents and restricted cash 13,966 (4,473)
Cash, cash equivalents and restricted cash at beginning of period 22,793 26,582
Cash, cash equivalents and restricted cash at end of period 36,759 22,109
Supplemental disclosure of non-cash transactions    
Change in property and equipment resulting from change in accounts payable 146 (478)
Change in property and equipment resulting from change in accrued expenses (212) (1,330)
Asset retirement obligation offset with asset retirement cost (property and equipment) 670
Fair value of common stock issued for intellectual property 2,149
Change in equity resulting from a change in accrued expenses $ 600