4. FACILITY ACQUISITIONS (Details - Revenue) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net revenue	$ 215,706	$ 208,366	$ 204,289	$ 181,267	$ 185,552	$ 184,059	$ 179,082	$ 168,876	$ 809,628	$ 717,569	$ 702,986
Net income	$ 881	$ 7,987	$ 3,395	$ (4,554)	$ 4,205	$ 4,451	$ 5,144	$ (12,424)	7,709	$ 1,376	$ 2,120
Diagnostic Imaging Group, LLC [Member]
Net revenue									17,498
Pretax income									1,880
Net income									$ 1,166