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v3.19.2

Cash, Cash Equivalent, and Investments (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and Cash Equivalents | $ 4,781,520 |  | $ 4,781,520 |  | $ 2,386,314
Short term investments, adjusted cost | 32,104,149 |  | 32,104,149 |  | 38,816,441
Long term investments, adjusted cost | 1,516,670 |  | 1,516,670 |  | 0
Cash and Investment, fair value | 38,423,674 |  | 38,423,674 |  | 41,117,434
Investment, gross unrealized holding gain | 26,111 |  | 26,111 |  | 0
Investment, gross unrealized holding losses | (4,775) |  | (4,775) |  | (85,321)
Cash and Investment, adjusted cost | 38,402,338 |  | 38,402,338 |  | 41,202,755
Cash |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and Cash Equivalents | 767,894 |  | 767,894 |  | 1,048,272
Money Market Funds | Level 1 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Cash and Cash Equivalents | 4,013,626 |  | 4,013,626 |  | 1,338,042
Corporate bonds |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Held-to-maturity, premium paid on purchase | 23,308 | $ 26,014 | 104,163 | $ 313,705 | 378,681
Corporate bonds | Level 2 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Short term investments, fair value | 32,119,864 |  | 32,119,864 |  | 38,731,120
Short term investments, gross unrealized holding gain | 20,490 |  | 20,490 |  | 0
Short term investments, gross unrealized holding loss | (4,775) |  | (4,775) |  | (85,321)
Short term investments, adjusted cost | 32,104,149 |  | 32,104,149 |  | $ 38,816,441
Long term Investments, fair value | 1,522,290 |  | 1,522,290 |  |
Long term Investments, gross unrealized holding gain | 5,621 |  | 5,621 |  |
Long term Investments, gross unrealized holding loss | 0 |  | 0 |  |
Long term investments, adjusted cost | $ 1,516,669 |  | $ 1,516,669 |  |

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