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Acquisition - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		11 Months Ended
	Aug. 11, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018
Business Acquisition [Line Items]
Contingent compensation related to acquisition		$ 2,773	$ 0
RAPM
Business Acquisition [Line Items]
Aggregate purchase price	$ 5,840
Cash paid for acquisition of business	5,228
Shares issued in connection with RAPM acquisition, value	612
Additional maximum amount payable to principals		$ 7,925		$ 7,925
Contingent compensation related to acquisition				$ 6,172
Goodwill acquired	$ 2,874
RAPM | Common Class A
Business Acquisition [Line Items]
Shares issued in connection with RAPM acquisition (in shares)	27,240
Customer Contracts | RAPM
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 2,948
Finite-lived intangible asset useful life	8 years

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Business Combination, Contingent Compensation

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Number of shares of equity interests issued or issuable to acquire entity.

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-SubTopic 30
-Section 50
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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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