CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Noncontrolling Interest [Member]	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment due to change in accounting policy	$ 0	$ 0	$ 0	$ 3,881	$ 0	$ 3,881
Beginning balance at Dec. 31, 2017	78	4,310	32	(141,370)	913	(136,037)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	2,040	1,480	3,520
Foreign currency translation gain (loss)	0	0	(9)	0	0	(9)
Distributions	0	0	0	0	(1,138)	(1,138)
Ending balance at Sep. 30, 2018	78	4,310	23	(135,449)	1,255	(129,783)
Beginning balance at Jun. 30, 2018	78	4,310	25	(139,562)	773	(134,376)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	4,113	715	4,828
Foreign currency translation gain (loss)	0	0	(2)	0	0	(2)
Distributions	0	0	0	0	(233)	(233)
Ending balance at Sep. 30, 2018	78	4,310	23	(135,449)	1,255	(129,783)
Beginning balance at Dec. 31, 2018	78	4,310	17	(139,129)	2,621	(132,103)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	(2,921)	1,705	(1,216)
Distributions	0	0	0	0	(1,403)	(1,403)
Ending balance at Sep. 30, 2019	78	4,310	17	(142,050)	2,923	(134,722)
Beginning balance at Jun. 30, 2019	78	4,310	19	(144,283)	1,857	(138,019)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	2,233	1,485	3,718
Foreign currency translation gain (loss)	0	0	(2)	0	0	(2)
Distributions	0	0	0	0	(419)	(419)
Ending balance at Sep. 30, 2019	$ 78	$ 4,310	$ 17	$ (142,050)	$ 2,923	$ (134,722)