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Fair Value of Financial Instruments and Non-Financial (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value of Financial Instruments and Non-Financial |
Summary of assets measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair value measurement at
​ | ​ | reporting date using
​ | ​ | Quoted prices | ​ | ​ | ​ | ​ | ​ | ​
​ |  | in active |  | Significant |  | ​ | ​
​ |  | ​ | markets for |  | other |  | Significant
​ |  | identical |  | observable |  | ​ | unobservable
​ |  | assets |  | inputs | ​ | inputs
(in thousands) |  | (Level 1) |  | (Level 2) |  | (Level 3)
September 30, 2023: |  | ​ |  |  | ​ |  |  | ​ |
Assets |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 27,347 | ​ | $ | - | ​ | $ | -
Commercial paper | ​ | ​ | - | ​ | ​ | 998 | ​ | ​ | -
Total cash equivalents | ​ | ​ | 27,347 | ​ | ​ | 998 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Certificates of deposit | ​ | ​ | - | ​ | ​ | 8,912 | ​ | ​ | -
Commercial paper | ​ | ​ | - | ​ | ​ | 44,818 | ​ | ​ | -
Corporate debt securities | ​ | ​ | - | ​ | ​ | 20,034 | ​ | ​ | -
U.S. government securities | ​ | ​ | - | ​ | ​ | 17,463 | ​ | ​ | -
U.S. government agency securities | ​ | ​ | - | ​ | ​ | 7,974 | ​ | ​ | -
Total marketable securities | ​ | ​ | - | ​ | ​ | 99,201 | ​ | ​ | -
Total financial assets | ​ | $ | 27,347 | ​ | $ | 100,199 | ​ | $ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2022: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 24,578 | ​ | $ | - | ​ | $ | -
Commercial paper | ​ | ​ | - | ​ | ​ | 2,491 | ​ | ​ | -
Total cash equivalents | ​ | ​ | 24,578 | ​ | ​ | 2,491 | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Certificates of deposit | ​ | ​ | - | ​ | ​ | 28,111 | ​ | ​ | -
Commercial paper | ​ | ​ | - | ​ | ​ | 58,512 | ​ | ​ | -
Corporate debt securities | ​ | ​ | - | ​ | ​ | 66,421 | ​ | ​ | -
U.S. government securities | ​ | ​ | - | ​ | ​ | 1,965 | ​ | ​ | -
Total marketable securities | ​ | ​ | - | ​ | ​ | 155,009 | ​ | ​ | -
Total financial assets | ​ | $ | 24,578 | ​ | $ | 157,500 | ​ | $ | -
Summary of non-financial instruments measured at fair value, on a nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) | ​ | Level 1 | ​ | Level 2 | ​ | Level 3 | ​ | Impairment Losses
Property and equipment, net | $ | - | $ | - | $ | 1,367 | $ | 3,205
Right of use assets | ​ | - | ​ | - | ​ | 933 | ​ | 2,185
Total | $ | - | $ | - | $ | 2,300 | $ | 5,390
​

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are 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. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + 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 (b) -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 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL7498348-110258 Reference 4: 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 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + 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 (b) -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 (bbb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 3: 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 + Details
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