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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Accounting Policies [Abstract] |
Summary of Available-for-sale Securities | The following is a summary of our available-for-sale securities as of September 30, 2021 and December 31, 2020:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
September 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed investment certificates |  | $ | 33,122 |  |  | $ | — |  |  | $ | — |  |  | $ | 33,122 |
Corporate bonds |  |  | 34,824 |  |  |  | — |  |  |  | (610 | ) |  |  | 34,214 |
Total available-for-sale securities |  | $ | 67,946 |  |  | $ | — |  |  | $ | (610 | ) |  | $ | 67,336 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed investment certificates |  | $ | 25,132 |  |  | $ | — |  |  | $ | — |  |  | $ | 25,132 |
Corporate bonds |  |  | 71,533 |  |  |  | 135 |  |  |  | (483 | ) |  |  | 71,185 |
Total available-for-sale securities |  | $ | 96,665 |  |  | $ | 135 |  |  | $ | (483 | ) |  | $ | 96,317 |
At September 30, 2021, maturities of our available-for-sale securities were as follows: |  |  |  |  |  |  |  |  |  |  |  |
Less than one year |  | $ | 50,510 |  |  | $ | — |  |  | $ | (445 | ) |  | $ | 50,065 |
Greater than one year |  | $ | 17,436 |  |  | $ | — |  |  | $ | (165 | ) |  | $ | 17,271 |

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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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