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Investments (Tables) | 9 Months Ended
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Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
Summary of Investments | The following is a summary of investments as of September 30, 2018 and December 31, 2017. The Company considered all investments as available for sale.
|  | As of September 30, 2018 |
|  | Adjusted Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
Municipal securities |  | $ | 69,192 |  |  | $ | — |  |  | $ | (438 | ) |  | $ | 68,754 |
Total investments |  | $ | 69,192 |  |  | $ | — |  |  | $ | (438 | ) |  | $ | 68,754 |
|  | As of December 31, 2017 |
|  | Adjusted Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
Municipal securities |  | $ | 84,768 |  |  | $ | — |  |  | $ | (409 | ) |  | $ | 84,359 |
Certificates of Deposit |  | $ | 4,915 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 4,912 |
Total investments |  | $ | 89,683 |  |  | $ | — |  |  | $ | (412 | ) |  | $ | 89,271 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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