Income (Loss) Per Share - Reconciliation of Basic and Diluted Income (Loss) Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share Basic And Diluted [Line Items]
Income (loss), continuing operations	$ (1,093)	$ (1,107)	$ (886)	$ (6,201)
Income (loss) from discontinued operations	0	0	0	41
Income (loss)	(1,093)	(1,107)	(886)	(6,160)
Income (loss) allocable to common stockholders	$ (1,093)	$ (5,699)	$ (886)	$ (14,479)
Weighted-average common shares—outstanding, basic	17,752	12,846	17,713	12,455
Weighted-average common shares—outstanding, diluted	17,752	12,846	17,713	12,455
Income (loss) per common share from continuing operations, basic	$ (0.06)	$ (0.44)	$ (0.05)	$ (1.17)
Income (loss) per common share from continuing operations, diluted	$ (0.06)	$ (0.44)	$ (0.05)	$ (1.17)
Class D-1 Preferred Units
Earnings Per Share Basic And Diluted [Line Items]
Deemed dividend on redemption of Class D-1 preferred units				$ (3,727)
Distribution to Class D-1 preferred unitholder		$ (4,592)		(4,592)
Continuing Operations
Earnings Per Share Basic And Diluted [Line Items]
Income (loss) allocable to common stockholders	$ (1,093)	(5,699)	$ (886)	(14,520)
Income (loss) allocated to common stockholders	$ (1,093)	$ (5,699)	$ (886)	$ (14,520)
Weighted-average common shares—outstanding, basic	17,752	12,846	17,713	12,455
Weighted-average common shares—outstanding, diluted	17,752	12,846	17,713	12,455
Income (loss) per common share from continuing operations, basic	$ (0.06)	$ (0.44)	$ (0.05)	$ (1.17)
Income (loss) per common share from continuing operations, diluted	$ (0.06)	$ (0.44)	$ (0.05)	$ (1.17)
Continuing Operations | Class D-1 Preferred Units
Earnings Per Share Basic And Diluted [Line Items]
Deemed dividend on redemption of Class D-1 preferred units				$ (3,727)
Distribution to Class D-1 preferred unitholder		$ (4,592)		(4,592)
Discontinued Operations
Earnings Per Share Basic And Diluted [Line Items]
Income (loss) allocable to common stockholders				41
Discontinued Operations | Class P Common Units
Earnings Per Share Basic And Diluted [Line Items]
Income (loss) allocated to Class P common units				$ 18
Weighted-average Class P common units - profit interests, basic and diluted				2,080
Weighted-average Class P units, basic and diluted				13,522
Income (loss) per Class P units, basic and diluted				$ 0.00
Discontinued Operations | Class P Preferred Units
Earnings Per Share Basic And Diluted [Line Items]
Income (loss) allocated to Class P preferred units				$ 23
Weighted-average Class P units, basic and diluted				17,682
Income (loss) per Class P units, basic and diluted				$ 0.00