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Investments (Schedule of Unrealized Loss on Investments) (Details) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
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Investments [Abstract] |  |
Aggregate Unrealized Losses, Less than one year | $ 69,283 | $ 365,824
Aggregate Fair Value, Less than one year | 20,786,455 | 68,722,980
Aggregate Unrealized Losses, Greater than one year | 0 | 433
Aggregate Fair Value, Greater than one year | 0 | 3,000,000
Aggregate Unrealized Losses, Total | 69,283 | 366,257
Aggregate Fair Value, Total | $ 20,786,455 | $ 71,722,980

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
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