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Significant Accounting Policies - Mutual Fund Administration Gross and Net Revenue (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from External Customer [Line Items]
Revenue	$ 38,264,674	$ 55,054,554	$ 119,542,174	$ 139,138,640
Administration revenue, gross
Revenue from External Customer [Line Items]
Revenue	6,129,695	7,436,287	19,550,947	22,466,306
Fund related expense
Revenue from External Customer [Line Items]
Expenses	3,707,104	4,230,112	11,537,907	13,461,575
Mutual fund administration revenue, net
Revenue from External Customer [Line Items]
Revenue	2,422,591	3,206,175	8,013,040	9,004,731
Mutual fund administration, net
Revenue from External Customer [Line Items]
Revenue	$ 2,422,591	$ 3,206,175	$ 8,013,040	$ 9,004,731

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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