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Cash, Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Cash and cash equivalents |  |
Amortized Cost | $ 10,658 | $ 4,789
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 10,658 | 4,789
Cash and cash equivalents | Money market funds |  |
Amortized Cost | 10,658 | 4,789
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 10,658 | 4,789
Marketable securities |  |
Amortized Cost | 34,087 | 41,510
Gross Unrealized Gains | 25 | 23
Gross Unrealized Losses |  | (2)
Fair Value | 34,112 | 41,531
Marketable securities | US Treasury securities |  |
Amortized Cost | 34,087 | 41,510
Gross Unrealized Gains | 25 | 23
Gross Unrealized Losses |  | (2)
Fair Value | 34,112 | 41,531
Short-term deposits |  |
Amortized Cost | 60,000 | 10,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 60,000 | 10,000
Short-term deposits | Term bank deposits |  |
Amortized Cost | 60,000 | 10,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | $ 60,000 | $ 10,000

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