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Significant Accounting Policies - Mutual Fund Administration Gross and Net Revenue (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from External Customer [Line Items]
Revenue	$ 39,018,232	$ 35,554,280	$ 111,974,495	$ 102,895,420
Administration revenue, gross
Revenue from External Customer [Line Items]
Revenue	6,402,818	5,491,424	18,051,623	16,247,752
Fund related expense
Revenue from External Customer [Line Items]
Expenses	4,614,461	3,605,495	12,499,921	10,563,585
Mutual fund administration revenue, net
Revenue from External Customer [Line Items]
Revenue	$ 1,788,357	$ 1,885,929	$ 5,551,702	$ 5,684,167

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