Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 313	$ 17
Marketable securities	938	2,700
Prepaid expenses and other assets	52	188
Total current assets	1,303	2,905
Property and equipment, net		1
Investments	8,130	10,345
Total assets	9,433	13,251
Current liabilities
Accounts payable and accrued expenses	257	132
Accrued salaries and benefits	594	732
Warrant liabilities	1	82
Payable to DatChat		207
Total current liabilities	852	1,153
Total liabilities	852	1,153
Stockholders' equity
Preferred Stock
Common stock, 0.0001 par value, 100,000,000 shares authorized; 2,593,783 and 2,010,028 shares issued at September 30, 2019 and December 31, 2018; 2,593,780 and 2,010,025 shares outstanding at September 30, 2019 and December 31, 2018
Additional paid-in-capital	154,084	152,445
Treasury stock, at cost, 3 shares at September 30, 2019 and December 31, 2018	(264)	(264)
Accumulated deficit	(145,239)	(140,083)
Total stockholders' equity	8,581	12,098
Total liabilities and stockholders' equity	9,433	13,251
Series D Preferred Stock [Member]
Stockholders' equity
Preferred Stock
Series D-1 Preferred Stock [Member]
Stockholders' equity
Preferred Stock