Short-term Investments (Details) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Amortized Cost | $ 14,267 | $ 6,494 |
| Unrealized Gains | 18 | 15 |
| Unrealized Losses | (15) | (14) |
| Fair Value | 14,270 | 6,495 |
| Commercial paper | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Amortized Cost | 8,267 | 998 |
| Unrealized Gains | 0 | 0 |
| Unrealized Losses | 0 | 0 |
| Fair Value | 8,267 | 998 |
| Overnight repurchase agreement | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Amortized Cost | 3,500 | |
| Unrealized Gains | 0 | |
| Unrealized Losses | 0 | |
| Fair Value | 3,500 | |
| U.S. government securities | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Amortized Cost | 6,000 | 1,996 |
| Unrealized Gains | 18 | 15 |
| Unrealized Losses | (15) | (14) |
| Fair Value | $ 6,003 | $ 1,997 |
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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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