Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net loss	$ (3,775)	$ (2,320)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of patent portfolio	1,027	1,027
Change in fair value of investment	(680)	(345)
Change in fair value of warrant liabilities	(560)	259
Stock-based compensation	314	13
Depreciation expense	38	2
Realized loss on marketable securities	361	303
Unrealized loss (gain) on marketable securities	14	(262)
Impairment of intangible assets	1,051
Changes in assets and liabilities:
Prepaid expenses and other assets	74	93
Accounts payable and accrued expenses	12	(75)
Accrued salaries and benefits	(117)	(177)
Deferred revenue		(932)
Accrued lease liabilities	(48)	(133)
Net cash used in operating activities	(2,289)	(2,547)
Cash flows from investing activities
Purchase of marketable securities	(13,310)	(11,283)
Sale of marketable securities	13,524	12,533
Purchase of investments at fair value	(677)	(675)
Purchase of property and equipment	(36)
Net cash (used in) provided by investing activities	(499)	575
Cash flows from financing activities
Cash from issuance common stock, net of offering cost	2,700	2,095
Repurchase of restricted stock units to pay for employee withholding taxes		(24)
Net cash provided by financing activities	2,700	2,071
Net (decrease) increase in cash and cash equivalents	(88)	99
Cash and cash equivalents, beginning of period	197	134
Cash and cash equivalents, end of period	109	233
Cash paid for interest and taxes		195
Investment in DatChat	$ 348

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