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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Cash flows from operating activities:    
Net loss $ (11,771) $ (10,398)
Adjustments to reconcile net loss to net cash used in operating activities:    
Noncash lease expense 22 0
Depreciation and amortization 778 1,465
Amortization of deferred financing costs and debt discount 354 383
Provision for excess inventory 0 433
Change in fair value of warrants 69 (1,676)
Allocation of issuance costs associated with warrants 1,233 343
Share-based compensation expense 106 325
Loss on asset disposal 0 23
Loss on sale of business 6,306 0
Increases (decreases) in cash caused by changes in operating assets and liabilities:    
Accounts receivable (4,851) (316)
Inventories 274 615
Other current assets 252 514
Other assets 298 7
Accounts payable and accrued expenses (95) (1,274)
Deferred revenues 29 93
Other long-term liabilities 54 (24)
Net cash used in operating activities (6,942) (9,487)
Cash flows from investing activities:    
Purchases of property and equipment (8) (128)
Proceeds from sale of business, net 2,789 0
Net cash provided by (used in) investing activities 2,781 (128)
Cash flows from financing activities:    
Principal payment of long-term obligations (642) 0
Payment of financing lease liability (75) 0
Proceeds from exercise of warrants 491 0
Proceeds from sale of common stock, net of offering cost 15,964 6,246
Net cash provided by financing activities 15,738 6,246
Effect of exchange rate changes on cash and cash equivalents (4) (10)
Net increase (decrease) in cash and cash equivalents 11,573 (3,379)
Cash, cash equivalents, and restricted cash at beginning of period 5,301 10,225
Cash, cash equivalents, and restricted cash at end of period 16,874 6,846
Cash paid during period for:    
Interest 1,071 990
Supplemental schedule of non-cash investing and financing activities:    
Proceeds from sales of business, net, paid directly to lender for principal payment of long-term obligations 3,050 0
Offering cost paid in warrants 213 0
Unpaid offering costs 403 0
Reclass of warrants upon exercise from liability to equity $ 794 $ 0