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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Cash flows from operating activities:    
Net loss $ (5,389) $ (32,765)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 28 19
Stock-based compensation 0 2,156
Amortization of intangible asset 17 17
Amortization of debt discounts 0 14,191
Change in fair value of warrant liability (175) 4,249
Change in fair value of derivative liability 171 3,386
Expense for issuance of consultant warrants and common stock 238 65
Changes in operating assets and liabilities:    
Accounts receivable 94 48
Inventories (699) (123)
Prepaid expenses and other assets (62) (407)
Accounts payable 486 743
Accrued liabilities (86) 60
Accrued interest 0 5,137
Net cash used in operating activities (5,377) (3,224)
Cash flows from investing activities:    
Purchases of property and equipment (25) (36)
Net cash used in investing activities (25) (36)
Cash flows from financing activities:    
Proceeds from issuance of common stock, net of issuance costs 4,664 0
Proceeds from the issuance of preferred stock and common stock warrant, net of issuance costs 920 0
Proceeds from issuance of promissory notes, net of issuance costs 0 2,002
Proceeds from issuance of convertible notes payable, net of issuance costs 0 1,435
Taxes paid related to net share settlements of equity awards (65) 0
Net cash provided by financing activities 5,519 3,437
Effect of exchange rate changes on cash and cash equivalents (13) (1)
Net decrease in cash and cash equivalents 104 176
Cash and cash equivalents as of beginning of year 3,218 249
Cash and cash equivalents as of end of year 3,322 425
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 7 2
Noncash Investing and Financing Activities:    
Issuance of warrants in connection with convertible notes payable 0 795
Issuance of common stock warrants in connection with preferred stock offering 243 0
Issuance of warrants in connection in public offering 70 0
Beneficial conversion feature of convertible notes payable 0 665
Fair value of derivative liability in connection with issuance of preferred stock 216 0
Accretion of preferred stock dividend 16 0
Issuance of convertible notes in lieu of employee expense payments 0 50
Conversion of accrued interest to accounts payable 0 2
Conversion of interest to convertible notes payable as principal 0 9
Fair value of derivative liability in connection with issuance of notes payable 0 1,558
Reclassification of warrant liability to stockholders' equity $ 0 $ 192

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