Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary of Significant Accounting Policies [Abstract]
Net income	$ (579)	$ 2,004	$ 2,989	$ 5,296
Less: warrant derivative gain		(853)	(225)	(1,683)
Less: beneficial conversion feature	(1,125)		(1,125)
Less: deemed dividend for convertible preferred shares	(71)		(71)
Diluted net (loss) income	$ (1,775)	$ 1,151	$ 1,568	$ 3,613
Basic weighted-average common shares outstanding during the period	7,693	5,620	7,346	5,554
Add dilutive effects of warrants and non-vested shares of restricted stock		968	316	904
Diluted weighted-average common shares outstanding during the period	7,693	6,588	7,662	6,458
Basic net (loss) income per common share	$ (0.08)	$ 0.36	$ 0.41	$ 0.95
Diluted net (loss) income per common share	$ (0.23)	$ 0.17	$ 0.2	$ 0.56