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Significant Accounting Policies - Mutual Fund Administration Gross and Net Revenue (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Mutual fund administration: |  |  |  |
Administration revenue, gross | $ 6,557,054 | $ 6,445,936 | $ 19,432,002 | $ 20,557,388
12b-1/service fees and commission revenue received from fund clients | 0 | 933,752 | 0 | 6,360,400
12b-1/service fees and commission expense payments to third parties | 0 | (831,198) | 0 | (5,660,429)
Fund related expense | (3,576,598) | (3,136,319) | (10,214,948) | (9,958,315)
Revenue, net of related expenses | 2,980,456 | 3,412,171 | 9,217,054 | 11,299,044
DHCM C-Share financing: |  |  |  |
Broker commission advance repayments | 101,238 | 157,732 | 315,283 | 558,641
Broker commission amortization | (92,668) | (144,738) | (284,998) | (545,463)
Financing activity, net | 8,570 | 12,994 | 30,285 | 13,178
Mutual fund administration revenue, net | $ 2,989,026 | $ 3,425,165 | $ 9,247,339 | $ 11,312,222

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- Definition Amount of fees and commissions from financial services and banking activities and correspondent clearing. Includes fees from depositor accounts, credit cards, merchant discounts, and fiduciary and trust activities, guarantee fees, investment advisory, management, and administrative fees, transfer agent fees, and insurance commissions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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