Fair value measurements (Details) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Marketable securities: | ||
| Available-for-sale securities, Debt Securities, Current, Total | $ 110,000 | $ 39,130 |
| Recurring basis | ||
| Marketable securities: | ||
| Corporate debt securities | 108,002 | |
| Treasury bills | 1,998 | |
| Available-for-sale securities, Debt Securities, Current, Total | 110,000 | |
| Recurring basis | Level 1 | ||
| Marketable securities: | ||
| Corporate debt securities | 108,002 | |
| Available-for-sale securities, Debt Securities, Current, Total | 108,002 | |
| Recurring basis | Level 2 | ||
| Marketable securities: | ||
| Treasury bills | 1,998 | |
| Available-for-sale securities, Debt Securities, Current, Total | $ 1,998 |
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- Definition Cost basis for treasury bills acquired for purposes other than retirement. No definition available.
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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