Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 873	$ (8,654)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense	311	393
Warrant revaluation income	(149)	(591)
Derivative revaluation expense (income)	4,605	(266)
Depreciation and amortization of long lived assets	251	302
Decrease (increase) in operating assets:
Accounts receivable	(2,525)	0
Contract asset	(11,454)	0
Prepaid expenses and other current assets	(1,106)	229
Increase (decrease) in operating liabilities:
Accounts payable	1,098	258
Related party payable	(28)	(2,240)
Accrued expenses, deferred rent	309	(223)
Accrued lease liabilities - operating lease	(66)	0
Accrued interest payable	596	575
Net cash used in operating activities	(7,285)	(10,217)
Cash flows from investing activities:
Purchase of property and equipment	(340)	(155)
Net cash used in investing activities	(340)	(155)
Cash flows from financing activities:
Payment of deferred offering costs	(37)	(444)
Proceeds from conversion of pre-funded warrants	0	24
Proceeds from conversion of common warrants	0	499
Net cash provided by (used in) financing activities	(37)	9,066
Effect of exchange rate changes on cash balances	0	0
Net decrease in cash and cash equivalents	(7,662)	(1,306)
Cash and cash equivalents, beginning of period	14,430	17,417
Cash and cash equivalents, end of period	6,768	16,111
Supplemental disclosures of cash flow information:
Property and equipment in accounts payable	130	72
Dividend paid in-kind to preferred stockholders	260	250
Deemed dividend on preferred stock	435	377
May 2018 Registered Direct Offering
Cash flows from financing activities:
Proceeds from Registered Direct Offering, net of offering costs	0	5,360
July 2018 Registered Direct Offering
Cash flows from financing activities:
Proceeds from Registered Direct Offering, net of offering costs	$ 0	$ 3,627