Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net loss	$ (5,156)	$ (3,775)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of patent portfolio		1,027
Change in fair value of investment	2,765	(680)
Change in fair value of warrant liabilities	(81)	(560)
Stock-based compensation	329	314
Depreciation expense		38
Realized loss on marketable securities	130	361
Unrealized loss (gain) on marketable securities	(132)	14
Impairment of intangible assets		1,051
Changes in assets and liabilities:
Prepaid expenses and other assets	136	74
Accounts payable and accrued expenses	125	12
Accrued salaries and benefits	(138)	(117)
Payable to DatChat	(207)
Accrued lease liabilities		(48)
Net cash used in operating activities	(2,229)	(2,289)
Cash flows from investing activities
Purchase of marketable securities	(6,651)	(13,310)
Sale of marketable securities	8,416	13,524
Purchase of investments at fair value	(550)	(677)
Purchase of property and equipment		(36)
Net cash provided by (used in) investing activities	1,215	(499)
Cash flows from financing activities
Proceeds from issuance common stock, net of offering cost	787	2,700
Proceeds from issuance common stock/ At-the-market offering	602
Offering costs fro the issuance of common stock / At-the-market offering	(79)
Net cash provided by financing activities	1,310	2,700
Net increase (decrease) in cash and cash equivalents	296	(88)
Cash and cash equivalents, beginning of period	17	197
Cash and cash equivalents, end of period	$ 313	$ 109