Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash flow from operating activities    
Net loss from continuing operations $ (1,629) $ (3,486)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation expense 26 26
Non-cash lease expense 159
Amortization of intangible assets 1
Amortization of lease incentive for tenant improvements 15
Non-cash interest income (122)
Non-cash interest expense 348
Loss on extinguishment of debt 340
Stock based compensation 24
Change in fair value of derivative liabilities 21 (811)
Loss on extinguishment of derivative liabilities 1,252
Bad debt expense 84  
Changes in operating assets and liabilities:    
Trade accounts receivable 134
Prepaid expenses and other current assets (7) (190)
Inventories (57)
Accounts payable and accrued liabilities (79) 186
Net cash used in operating activities - continuing operations (1,469) (2,296)
Net cash provided by operating activities - discontinued operations 214
Net cash used in operating activities (1,469) (2,082)
Cash flows from investing activities    
Proceeds from notes receivable, net of imputed interest 416
Purchase of intangible asset (50)
Net cash provided by (used in) investing activities - continuing operations 416 (50)
Net cash used in investing activities - discontinued operations (31)
Net cash provided by (used in) investing activities 416 (81)
Cash flows from financing activities    
Proceeds from issuance of stock in connection with exercise of warrants, net of issuance costs 1,328
Payments on operating lease liability (230)
Proceeds from issuance of debt 705
Net cash provided by (used in) by financing activities (230) 2,033
Net decrease in cash and cash equivalents (1,283) (130)
Cash and cash equivalents at beginning of period 5,447 539
Cash and cash equivalents at end of period 4,164 409
Noncash investing and financing activities    
Right-of-use assets and assumption of operating lease liability 659
Debt exchange 2,265
Issuance of common stock in exchange for reduction in debt 1,453
Warrants issued in association with debt 98
Supplemental cash flow information    
Cash paid for interest $ 72