CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)			1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Feb. 27, 2019	Jan. 06, 2017	Jan. 31, 2018	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Feb. 28, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income				$ 7,591,000	$ 5,668,000	$ 1,013,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization				20,083,000	39,703,000	35,942,000
Amortization of operating lease right-of-use assets					32,937,000
Equity in earnings of joint ventures				(2,244,000)	(4,117,000)	(6,725,000)
Distributions from joint ventures					3,438,000	7,083,000
Amortization deferred financing costs and loan discount					2,021,000	1,949,000
Loss (gain) on sale and disposal of equipment				101,000	1,073,000	(1,831,000)
Stock-based compensation					5,582,000	4,890,000
Other noncash items included in cost of operations					(559,000)	0
Change in fair value of contingent consideration					(1,953,000)	0
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions:
Accounts receivable					(12,042,000)	(7,113,000)
Other current assets					4,331,000	(568,000)
Other assets					2,069,000	(900,000)
Deferred taxes					(3,542,000)	(78,000)
Operating lease liability					(32,268,000)
Deferred rent					0	1,788,000
Deferred revenue					(666,000)	153,000
Accounts payable, accrued expenses and other					2,860,000	11,345,000
Net cash provided by operating activities					44,535,000	46,948,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of imaging facilities					(27,149,000)	(14,094,000)
Equity investments at fair value					(143,000)	(2,200,000)
Purchase of property and equipment					(50,342,000)	(45,133,000)
Proceeds from sale of equipment					760,000	2,324,000
Proceeds from the sale of equity interests in a joint venture					132,000	0
Equity contributions in existing and purchase of interest in joint ventures					(103,000)	(2,000,000)
Net cash used in investing activities					(76,845,000)	(61,103,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes and leases payable					(3,320,000)	(3,393,000)
Payments on term loan debt					(19,469,000)	(16,540,000)
Deferred financing costs from debt issuance					(683,000)	0
Debt discount from debt issuance					(2,173,000)	0
Proceeds from debt issuance					100,000,000	0
Distributions paid to noncontrolling interests					0	(913,000)
Proceeds from sale of noncontrolling interest					5,275,000	0
Contribution from noncontrolling partner					750,000	0
Proceeds from revolving credit facility					236,200,000	19,800,000
Payments on revolving credit facility					(264,200,000)	(19,800,000)
Proceeds from issuance of common stock upon exercise of options					50,000	0
Net cash provided by (used in) financing activities					52,430,000	(20,846,000)
EFFECT OF EXCHANGE RATE CHANGES ON CASH					(5,000)	(69,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS					20,115,000	(35,070,000)
CASH AND CASH EQUIVALENTS, beginning of period			$ 51,322,000		10,389,000	51,322,000	$ 51,322,000
CASH AND CASH EQUIVALENTS, end of period				30,504,000	30,504,000	16,252,000	10,389,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest					23,292,000	17,509,000
Equipment acquired and leasehold improvements					14,000,000	13,600,000
Accrued euity interest distribution to noncontrolling interest				1,800,000	1,800,000
Capital lease debt					0	$ 4,000,000
Fixed assets transferred from Beach Imaging LLC			$ 15,000,000
Investment in joint venture, ScriptSender, LLC		$ 3,000,000					$ 268,000
Ventura County Imaging Group, LLC
Fixed assets acquired				$ 4,300,000	$ 4,300,000
Hudson Valley Radiology Associates
Equity interest issued, value assigned								$ 6,000,000
Variable Interest Entity, Not Primary Beneficiary
Shares issues (in shares)	440,207
Variable Interest Entity, Not Primary Beneficiary | Hudson Valley Radiology Associates
Equity interest issued, value assigned	$ 6,000,000