CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized	500,000,000	500,000,000
Common stock, issued	26,638,799	11,925,791
Common stock, outstanding	26,638,799	11,925,791
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized	3,000,000	3,000,000
Preferred stock, issued	27,898	123,668
Preferred stock, outstanding	27,898	123,668
Redeemable Convertible Series B Preferred Stock [Member]
Redeemable Convertible Preferred Stock Series B, par value (in dollars per share)	$ .01	$ 0.01
Redeemable Convertible Preferred Stock Series B, authorized	0	15,000,000
Redeemable Convertible Preferred Stock Series B, issued	0	1,500,000
Redeemable Convertible Preferred Stock Series B, outstanding	0	1,500,000
Redeemable Convertible Preferred Stock Series B, aggregate liquidation preference	$ 0	$ 1,503