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Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Investments [Abstract] |
Investments | The following table summarizes the contract maturity of the available-for-sale securities the Company held as of September 30, 2021:
One year or less | 100 | %
After one year but within two years | — | %
Total | 100 | %
Debt Securities, Available-for-sale | The amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of cash equivalents and available-for-sale securities by type of security at September 30, 2021 and December 31, 2020 were as follows:
| September 30, 2021
| Amortized Costs |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Fair Value
Commercial paper | $ | 6,498 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 6,497 |
Corporate notes/bonds | 1,205 |  |  | — |  |  | — |  |  | 1,205 |
U.S. Government agency securities | 1,251 |  |  | — |  |  | — |  |  | 1,251 |
| $ | 8,954 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 8,953 |
| December 31, 2020
| Amortized Costs |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Fair Value
Commercial paper | $ | 15,992 |  |  | $ | 2 |  |  | $ | (3) |  |  | $ | 15,991 |
Corporate notes/bonds | 29,227 |  |  | 72 |  |  | (3) |  |  | 29,296 |
U.S. Treasuries | 2,251 |  |  | 2 |  |  | — |  |  | 2,253 |
U.S. Government agency securities | 1,265 |  |  | 13 |  |  | — |  |  | 1,278 |
| $ | 48,735 |  |  | $ | 89 |  |  | $ | (6) |  |  | $ | 48,818 |

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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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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI http://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI http://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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