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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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