Net Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net loss - Basic	$ (3,741)	$ (17,823)	$ (10,375)	$ (24,925)
Dilutive shares related to warrants	0	0	0	0
Net loss - Dilutive	$ (4,214)	$ (17,823)	$ (10,375)	$ (24,925)
Weighted Average Number of Shares Outstanding, Basic	4,028,304	3,665,134	3,802,812	3,512,868
Dilutive shares related to warrants	0	0	0	0
Weighted Average Number of Shares Outstanding, Diluted	4,028,304	3,665,134	3,802,812	3,512,868
Earnings Per Share, Basic	$ (0.93)	$ (4.90)	$ (2.73)	$ (7.00)
Earnings Per Share, Diluted	$ (0.93)	$ (4.90)	$ (2.73)	$ (7.00)