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Acquisition - Additional Information (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 11, 2017 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Cash paid for acquisition |  | $ 0 | $ 0 | $ 5,228
Common stock issued in acquisition |  | 0 | 0 | $ 612
Goodwill |  | $ 3,943 | $ 3,943 |
Real Asset Portfolio Management LLC |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash paid for acquisition | $ 5,840 |  |  |
Aggregate purchase price | 5,228 |  |  |
Additional maximum amount payable to principals | 8,499 |  |  |
Goodwill | $ 2,874 |  |  |
Real Asset Portfolio Management LLC | Common Class A |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Common stock issued in acquisition (in shares) | 27,240 |  |  |
Common stock issued in acquisition | $ 612 |  |  |
Customer Contracts | Real Asset Portfolio Management LLC |  |  |  |
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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