Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 8,077	$ (5,795)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense	229	260
Warrant revaluation income	(8)	(326)
Derivative revaluation expense (income)	1,083	(179)
Depreciation and amortization of long lived assets	168	202
Decrease (increase) in operating assets:
Accounts receivable	(1,911)	0
Contract asset	(12,718)	0
Prepaid expenses and other current assets	(706)	30
Increase (decrease) in operating liabilities:
Accounts payable	485	51
Related party payable	3,715	(2,027)
Income taxes payable	634	0
Accrued expenses, deferred rent	(67)	(74)
Accrued lease liabilities - operating lease	(23)	0
Accrued interest payable	396	382
Net cash used in operating activities	(646)	(7,476)
Cash flows from investing activities:
Purchase of property and equipment	(87)	(83)
Net cash used in investing activities	(87)	(83)
Cash flows from financing activities:
Payment of deferred offering costs	(22)	(444)
Proceeds from conversion of pre-funded warrants	0	24
Proceeds from conversion of common warrants	0	499
Proceeds from May 2018 Registered Direct Offering, net of offering costs of $527	0	5,473
Net cash provided by (used in) financing activities	(22)	5,552
Effect of exchange rate changes on cash balances	0	0
Net decrease in cash and cash equivalents	(755)	(2,007)
Cash and cash equivalents, beginning of period	14,430	17,417
Cash and cash equivalents, end of period	13,675	15,410
Supplemental disclosures of cash flow information:
Property and equipment in accounts payable	157	52
Offering costs in accounts payable and accrued expenses	15	100
Dividend paid in-kind to preferred stockholders	171	165
Deemed dividend on preferred stock	$ 285	$ 247