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Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Measurement |
Schedule of financial instruments measured at fair value on recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2021
​ | ​ | Quoted Market | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Prices in Active | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​
​ | ​ | Markets for | ​ | Significant Other | ​ | Unobservable | ​ | ​ | ​
​ | ​ | Identical Assets | ​ | Observable Inputs | ​ | Inputs | ​ | Total Fair Value
(in thousands) |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Measurements
Assets: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Cash equivalents: | ​ | $ | 12,324 | ​ | $ | — | ​ | $ | — | ​ | $ | 12,324
Liabilities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Contingent consideration current |  | ​ | — |  | ​ | — |  | ​ | 1,717 |  | ​ | 1,717
Contingent consideration non‑current |  | ​ | — |  | ​ | — |  | ​ | — |  | ​ | —
Contingent consideration | ​ | $ | — | ​ | $ | — | ​ | $ | 1,717 | ​ | $ | 1,717
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2020
​ | ​ | Quoted Market | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Prices in Active | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​
​ | ​ | Markets for | ​ | Significant Other | ​ | Unobservable | ​ | ​ | ​
​ | ​ | Identical Assets | ​ | Observable Inputs | ​ | Inputs | ​ | Total Fair Value
(in thousands) |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Measurements
Assets: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Cash equivalents: | ​ | $ | 2,474 | ​ | $ | — | ​ | $ | — | ​ | $ | 2,474
Liabilities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Contingent consideration current |  | ​ | — |  | ​ | — |  | ​ | 1,198 |  | ​ | 1,198
Contingent consideration non‑current |  | ​ | — |  | ​ | — |  | ​ | 462 |  | ​ | 462
Contingent consideration | ​ | $ | — | ​ | $ | — | ​ | $ | 1,660 | ​ | $ | 1,660
Schedule of fair value measurements of the contingent consideration categorized with Level 3 | ​
​ | ​ | ​ | ​
(in thousands) |  | ​ | ​
Balance as of January 1, 2019 | ​ | $ | —
Fair value at date of acquisition | ​ | ​ | 4,689
Fair value adjustments | ​ | ​ | (1,079)
Payments during the year | ​ | ​ | (601)
Accretion expense | ​ | ​ | 201
Balance as of December 31, 2019 |  | $ | 3,210
Fair value adjustments |  | ​ | (949)
Payments during the year |  | ​ | (601)
Balance as of December 31, 2020 | ​ | $ | 1,660
Fair value adjustments | ​ |  | 57
Payments during the year | ​ |  | —
Balance as of December 31, 2021 | ​ | $ | 1,717

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + 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 (c) -URI http://asc.fasb.org/extlink&oid=123874694&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 http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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