Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Cash flow from operating activities    
Net loss from continuing operations $ (2,359) $ (5,666)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation expense 52 53
Non-cash lease expense 171 (99)
Amortization of intangible assets 2
Amortization of lease incentive for tenant improvements 28
Non-cash interest income (237)
Non-cash interest expense 812
Loss on extinguishment of debt 340
Stock based compensation 1 34
Change in fair value of derivative liabilities (610) (2,020)
Loss on extinguishment of derivative liabilities 1,252
Loss on disposal of equipment 51
Bad debt expense 9
Changes in operating assets and liabilities:    
Trade accounts receivable 79
Prepaid expenses and other current assets (63) (76)
Inventories (5)
Accounts payable and accrued liabilities (19) (241)
Net cash used in operating activities - continuing operations (2,979) (5,532)
Net cash used in operating activities - discontinued operations (402)
Net cash used in operating activities (2,979) (5,934)
Cash flows from investing activities    
Purchase of property and equipment (15)
Proceeds from notes receivable, net of imputed interest 695
Purchase of intangible asset (50)
Net cash provided by (used in) investing activities - continuing operations 680 (50)
Net cash used in investing activities - discontinued operations   (107)
Net cash used in investing activities 680 (157)
Cash flows from financing activities    
Proceeds from issuance of stock in connection with exercise of warrants, net of issuance costs 1 1,633
Proceeds from issuance of common stock, net of fees ($131) 397
Proceeds from issuance of preferred stock, net of issuance costs ($668) 6,754
Proceeds from issuance of warrant derivative liabilities, net of issuance costs ($682) 7,577
Payments on operating lease liability (354)
Proceeds from issuance of debt 705
Payments on debt (2,282)
Net cash provided by (used in) financing activities 44 14,387
Net increase (decrease) in cash and cash equivalents (2,255) 8,296
Cash and cash equivalents at beginning of period 5,447 539
Cash and cash equivalents at end of period 3,192 8,835
Noncash investing and financing activities    
Right-of-use assets and assumption of operating lease liability 2,704
Reduction of derivative liability due to exercise of warrants 1
Hercules and MEF I, LP/Anson Investments Debt Exchange 2,265
Issuance of common stock in exchange for reduction in debt 1,453
Extinguishment of derivative liabilities through exercise of warrants 565
Warrants issued in association with debt 98
Supplemental cash flow information    
Cash paid for interest $ 2 $ 337