Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2016	$ 61	$ 125,577	$ (123,825)	$ (55)	$ 1,758
Balance, shares at Dec. 31, 2016	6,134,506
Placement fees recorded in equity		(114)			(114)
Revised 2016 option grants	$ (1)	196			$ 195
Revised 2016 option grants, shares	(151,008)				170,000
Shares issued in Exchange Transaction	$ 58	8,845			$ 8,903
Shares issued in Exchange Transaction, shares	5,819,270
Stock-based compensation		128			128
Unrealized loss on marketable equity securities				(848)	(848)
Net loss			(1,361)		(1,361)
Balance at Dec. 31, 2017	$ 118	134,632	(125,186)	(903)	$ 8,661
Balance, shares at Dec. 31, 2017	11,802,768
Revised 2016 option grants, shares
Accumulated other comprehensive loss related to marketable securities			(903)	903
Issuance of shares in at-the-market transactions, net of fees	$ 13	1,653			$ 1,666
Issuance of shares in at-the-market transactions, net of fees, shares	1,288,537				1,288,537
Issuance of shares to employees, net of shares withheld for taxes	$ 3	376			$ 379
Issuance of shares to employees, net of shares withheld for taxes, shares	314,533
Amortization of stock option awards		53			53
Net loss			(1,040)		(1,040)
Balance at Dec. 31, 2018	$ 134	$ 136,714	$ (127,129)		$ 9,719
Balance, shares at Dec. 31, 2018	13,405,838