Condensed Consolidated Statements of Members/Stockholders Equity - USD ($)	Class A Common Stock [Member]	Class B Common Stock [Member]	Member Equity [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Distributions In Excess Of Net Income [Member]	Additional Paid In Capital [Member]	Noncontrolling Interest [Member]	Total
Beginning Balance at Dec. 31, 2015			$ 46,339,000		$ (42,000)		$ (22,000)	$ 46,275,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)			(3,398,000)				3,000	(3,395,000)
Other comprehensive income					(1,898,000)			(1,898,000)
Ending Balance at Dec. 31, 2016			42,941,000		(1,940,000)		(19,000)	40,982,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)								11,208,000
Accrued tax distribution prior to recapitalization			(511,000)					(511,000)
Issuance of common stock for merger	$ 6,000							6,000
Issunce of common stock for merger (in shares)	6,035,083
Issuance of Class B Shares		$ 8,000						8,000
Issuance of Class B Shares (in shares)		8,401,522
Exhange of LLC Interests held by Continuing LLC owners and certain employees for Class A common stock			$ (53,591,000)		668,000	$ 28,497,000	24,426,000
Stock based compensation expense						151,000	95,000	246,000
Issuance of Class A Shares for IPO net of under writing discounts and offering costs	$ 7,000					104,003,000		104,010,000
Issuance of Class A Shares for IPO net of under writing discounts and offering costs (in shares)	7,187,500
Payment of preference notes to affiliates						(55,960,000)		(55,960,000)
Increase in deferred tax asset from step-up in tax basis						9,814,000		9,814,000
Purchase of noncontrolling interests					(120,000)	(15,313,000)	13,300,000	(2,133,000)
Common unit issued in exchange of shares value		$ 0
Common unit issued in exchange of shares (in shares)		(133,334)
Accrued Tax Distributions							(198,000)	(198,000)
Ending Balance at Sep. 30, 2017	$ 13,000	$ 8,000		$ (226,000)	$ (684,000)	$ 71,192,000	$ 37,998,000	$ 108,301,000
Ending Balance (in shares) at Sep. 30, 2017	13,222,583	8,268,188