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v3.19.3.a.u2

Investments (Tables) | 12 Months Ended
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Dec. 31, 2019
Investments |
Summary of available-for-sale securities |
|  | As of December 31, 2019
|  |  |  |  | Gross |  | Gross |  |  |
|  |  |  |  | Unrealized |  | Unrealized |  | Fair
|  | Cost |  | Gains |  | Losses |  | Value
Corporate bonds: |  |  |  |  |  |  |  |  |  |  |  |
U.S. corporations |  | $ | 2,258,686 |  | $ | 29,123 |  | $ | — |  | $ | 2,287,809
International corporations |  |  | 471,139 |  |  | 9,339 |  |  | — |  |  | 480,478
Total |  | $ | 2,729,825 |  | $ | 38,462 |  | $ | — |  | $ | 2,768,287
|  | As of December 31, 2018
|  |  |  |  | Gross |  | Gross |  |  |
|  |  |  |  | Unrealized |  | Unrealized |  | Fair
|  | Cost |  | Gains |  | Losses |  | Value
Corporate bonds: |  |  |  |  |  |  |  |  |  |  |  |
U.S. corporations |  | $ | 5,487,645 |  | $ | — |  | $ | 58,309 |  | $ | 5,429,336
International corporations |  |  | 918,417 |  |  | 2,162 |  |  | — |  |  | 920,579
Total |  | $ | 6,406,062 |  | $ | 2,162 |  | $ | 58,309 |  | $ | 6,349,915
Scheduled maturities of investments |
|  | Cost |  | Fair Value
Less than 1 year |  | $ | 471,139 |  | $ | 480,478
1 to 3 years |  |  | 2,258,686 |  |  | 2,287,809
Total |  | $ | 2,729,825 |  | $ | 2,768,287

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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