Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net loss	$ (2,331)	$ (1,808)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	8	11
Amortization of debt issuance costs non-cash interest expense		18
Non-cash interest expense	110	198
Accretion of debt discount	66
Stock-based compensation expense	59	29
Re-measurement of derivative liabilities	1	(1)
Changes in operating assets and liabilities:
Accounts receivable		40
Prepaid expenses and other current assets	(26)	(29)
Accounts payable	(583)	(353)
Accrued expenses	(768)	(79)
Net cash used in operating activities	(3,464)	(1,974)
Investing activities
Purchases of property and equipment	(5)
Net cash used in investing activities	(5)
Financing activities
Proceeds from issuance of common stock, net of issuance costs		1,503
Debt issuance costs	(103)
Proceeds from long term debt, related party	1,000
Net cash provided by financing activities	897	1,503
Net decrease in cash and cash equivalents	(2,572)	(471)
Cash, cash equivalents and restricted cash at beginning of period	3,836	3,064
Cash, cash equivalents and restricted cash at end of period	1,264	2,593
Supplemental cash flow disclosures
Income taxes paid	6	$ 11
Interest paid	$ 394