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Investments in Securities and Fair Value Schedule of Gross Realized Gains (Losses) on Securities (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized gains | $ 1,147,649 | $ 1,578,053 | $ 1,028,133
Gross realized losses | (408,918) | (1,610,275) | (524,396)
Net realized gain (loss) | 738,731 | (32,222) | 503,737
Impairments of other assets and investments | 0 | (233,069) | (10,062)
Net gain on other assets and investments | 29,705 | 149,128 | 45,288
Net loss on other assets and investments | 0 | 0 | (270,669)
Realized Investment Gains (Losses) | 29,705 | (83,941) | (235,443)
Gain (Loss) on Investments | 768,436 | (116,163) | 268,294
Special revenue issuer obligations of U S states, territories and political subdivisions |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized gains | 161 | 0 | 0
Corporate debt securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized gains | 119,001 | 5,417 | 6,670
Common stocks and nonredeemable preferred stocks |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized gains | 953,491 | 1,572,636 | 1,021,463
Gross realized losses | (173,357) | (846,500) | (509,854)
Auction rate securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized gains | 74,996 | 0 | 0
General obligations of U.S. states, territories and political subdivisions |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized losses | (535) | (12,319) | 0
Special revenue issuer obligations of U S states, territories and political subdivisions |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized losses | (1,085) | (397) | 0
Other than temporary impairment of securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross realized losses | $ (233,941) | $ (751,059) | $ (14,542)

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- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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