XML 37 R26.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivative Warrant Liabilities - Schedule of Outstanding Warrants Liabilities (Details) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Estimated fair value of warrant liability $ 15 $ 28