Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Patient revenues, net	$ 139,664		$ 141,431		$ 141,082		$ 141,285		$ 144,367		$ 146,377		$ 142,550		$ 141,500
Professional liability expense	2,906	[1]	2,933	[1]	3,182	[1]	2,775	[1]	2,753	[2]	2,617	[2]	2,724	[2]	2,670	[2]	$ 11,796	$ 10,764	$ 8,456
Loss from continuing operations	423		(7,389)		(307)		(81)		(5,947)		(581)		381		1,348		(7,354)	(4,799)	(1,744)
Income (loss) from discontinued operations	(8)		(8)		(4)		(22)		14		1		(28)		(15)		(42)	(28)	(67)
NET LOSS	$ 415		$ (7,397)		$ (311)		$ (103)		$ (5,933)		$ (580)		$ 353		$ 1,333		$ (7,396)	$ (4,827)	$ (1,811)
Basic net loss per common share
Income (loss) from continuing operations (in dollars per share)	$ 0.07		$ (1.15)		$ (0.05)		$ (0.01)		$ (0.94)		$ (0.09)		$ 0.06		$ 0.22		$ (1.15)	$ (0.76)	$ (0.28)
Loss from discontinued operations (in dollars per share)	0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		(0.01)	(0.01)	(0.01)
Net income (loss) (in dollars per share)	0.07		(1.15)		(0.05)		(0.01)		(0.94)		(0.09)		0.06		0.22		(1.16)	(0.77)	(0.29)
Diluted net loss per common share
Income (loss) from continuing operations (in dollars per share)	0.07		(1.15)		(0.05)		(0.01)		(0.94)		(0.09)		0.06		0.21		(1.15)	(0.76)	(0.28)
Loss from discontinued operations (in dollars per share)	0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		(0.01)	(0.01)	(0.01)
Diluted net income (loss) per common share (in dollars per share)	$ 0.07		$ (1.15)		$ (0.05)		$ (0.01)		$ (0.94)		$ (0.09)		$ 0.06		$ 0.21		$ (1.16)	$ (0.77)	$ (0.29)

[1] The Company's quarterly results are significantly affected by the amounts recorded for professional liability expense, as discussed further in Note 9, "Commitments and Contingencies". The amount of expense recorded for professional liability in each quarter of 2018 is set forth in the table above.

[2] The Company's quarterly results are significantly affected by the amounts recorded for professional liability expense, as discussed further in Note 9, "Commitments and Contingencies". The amount of expense recorded for professional liability in each quarter of 2017 is set forth in the table above.