Redeemable Convertible Preferred Stock and Stockholders' Deficit (Details Narrative 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
General and administrative expenses	$ 1,210		$ 10,817
Restricted Stock [Member]
Equity-based compensation expense	14	$ 811
Unrecognized compensation cost related to non-vested stock awards	$ 86
Non-Employee Director Stock Option Plan [Member]
Number of shares authorized (in shares)	1,250,000
Number of shares reserved for issuance (in shares)	240,018
Equity Compensation Plan ("2005 Equity Plan") [Member]
Number of shares authorized (in shares)	3,500,000