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Fair Value of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2022
Fair Value Disclosures [Abstract] |
Schedule of Estimated Fair Values of Financial Instruments Outstanding | The estimated fair values of financial instruments outstanding were (in thousands):
|  | June 30, 2022 |
|  |  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 2,820 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,820 |
Short-term investments |  |  | 2,100 |  |  |  | — |  |  |  | (6 | ) |  |  | 2,094 |
Long-term investments |  |  | 1,117 |  |  |  | — |  |  |  | (35 | ) |  |  | 1,082 |
|  | $ | 6,037 |  |  | $ | — |  |  | $ | (41 | ) |  | $ | 5,996 |
|  | December 31, 2021 |
|  |  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 5,893 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,893 |
Short-term investments |  |  | 9,276 |  |  |  | — |  |  |  | (9 | ) |  |  | 9,267 |
Long-term investments |  |  | 2,935 |  |  |  | — |  |  |  | (7 | ) |  |  | 2,928 |
|  | $ | 18,104 |  |  | $ | — |  |  | $ | (16 | ) |  | $ | 18,088 |
Schedule of Fair Value Hierarchy for Financial Assets (Cash Equivalents and Investments) | The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) (in thousands):
|  | June 30, 2022 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 263 |  |  | $ | 263 |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  | $ | 3,176 |  |  | $ | — |  |  | $ | 3,176 |  |  | $ | — |
|  | $ | 3,439 |  |  | $ | 263 |  |  | $ | 3,176 |  |  | $ | — |
|  | December 31, 2021 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 1,159 |  |  | $ | 1,159 |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  | $ | 12,195 |  |  | $ | — |  |  | $ | 12,195 |  |  | $ | — |

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- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the summary of investment holdings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010 + Details
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