Summary of Significant Accounting Policies (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic loss per share computation:
Net loss	$ (13,119)	$ (919)	$ (17,921)	$ (88)
Weighted average common shares - basic and diluted	53,510,712	53,304,407	53,484,756	53,250,109
Basic and diluted loss per share (in dollars per share)	$ (0.25)	$ (0.02)	$ (0.34)	$ 0.00