Business - Additional Information (Details) - shares	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Nature of Operations [Line Items]
Tax receivable agreement description	The agreement provides for the payment from time to time, as “corporate taxpayer,” to holders of LLC Units of 90% of the amount of the benefits, if any, that the corporate taxpayer is deemed to realize as a result of the exchange of LLC Units (current and future) and certain other tax benefits related to the Company entering into the agreement.
Percentage of payment obligations of corporate taxpayer under agreement	90.00%
Director [Member]
Nature of Operations [Line Items]
Percentage of voting power in common stock	40.00%
Common Class A [Member]
Nature of Operations [Line Items]
Common stock, shares outstanding	4,535,750	4,426,789
Common Class A [Member] | Director [Member]
Nature of Operations [Line Items]
Description of share exchange ratio under exchange agreement	one-to-one
Common Class B [Member]
Nature of Operations [Line Items]
Common stock, shares outstanding	6	7
Description of share exchange ratio under exchange agreement	One share
Common units, outstanding	2,730,000
NonControlling Interest [Member]
Nature of Operations [Line Items]
Percentage of voting power in common stock	40.00%