XML 28 R19.htm IDEA: XBRL DOCUMENT
v3.22.1

Fair Value Measurement (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
Fair Value Measurement |
Schedule of financial assets and liabilities measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | March 31, 2022
(in thousands) |  | Level 1 | ​ | Level 2 | ​ | Level 3 | ​ | Total
Financial Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash | ​ | $ | 11,485 | ​ | $ | — | ​ | $ | — | ​ | $ | 11,485
Money market funds | ​ | ​ | 10,024 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 10,024
Commercial paper | ​ |  | — | ​ | ​ | 68,463 | ​ | ​ | — | ​ | ​ | 68,463
U.S. government treasury bills | ​ | ​ | 122,385 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 122,385
Government-sponsored enterprise securities | ​ |  | — | ​ | ​ | 55,510 | ​ | ​ | — | ​ | ​ | 55,510
Total | ​ | $ | 143,894 | ​ | $ | 123,973 | ​ | $ | — | ​ | $ | 267,867
Schedule of financial assets reconciliation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Estimated
(in thousands) |  | Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
Financial Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | $ | 21,509 | ​ | $ | — | ​ | $ | — | ​ | $ | 21,509
Short-term marketable securities (<12 months to maturity) | ​ | ​ | 183,482 | ​ | ​ | — | ​ | ​ | (747) | ​ | ​ | 182,735
Long-term marketable securities (>12 months to maturity) | ​ |  | 64,502 | ​ |  | — | ​ |  | (879) | ​ | ​ | 63,623
Total | ​ | $ | 269,493 | ​ | $ | — | ​ | $ | (1,626) | ​ | $ | 267,867

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration