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Significant Accounting Policies - Mutual Fund Adminstration Revenue (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Mutual fund administration: |  |  |
Administration revenue, gross | $ 26,664,635 | $ 27,042,861 | $ 22,968,369
12b-1/service fees and commission revenue received from fund clients | 6,360,400 | 11,087,978 | 10,514,242
12b-1/service fees and commission expense payments to third parties | (5,660,430) | (9,617,568) | (9,102,565)
Fund related expense | (12,937,067) | (12,031,353) | (9,753,359)
Revenue, net of fund related expenses | 14,427,538 | 16,481,918 | 14,626,687
DHCM C-Share financing: |  |  |
Broker commission advance repayments | 691,228 | 991,430 | 878,105
Broker commission amortization | (660,840) | (962,919) | (846,861)
Financing activity, net | 30,388 | 28,511 | 31,244
Mutual fund administration revenue, net | $ 14,457,926 | $ 16,510,429 | $ 14,657,931

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- Definition Amount of revenue from providing administrative services, including, but not limited to, accounting, tax, legal, regulatory filing, and share registration activities of managed funds and investment accounts of independent third parties and related and affiliated entities. + References No definition available. + Details
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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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