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Research Funding Agreement - Additional Information (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Mar. 06, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Research And Development Arrangement Contract To Perform For Others [Line Items] |  |  |
Amounts received for qualifying expenses incurred recorded as reduction of research and development expense |  | $ 500,000 |
Silverstein Foundation | Funding Agreement |  |  |
Research And Development Arrangement Contract To Perform For Others [Line Items] |  |  |
Upfront sum of funding amount | $ 500,000 |  |
Qualifying expenses |  | $ 0 | $ 0

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- Definition Amount received for qualifying expenses incurred recorded as reduction of research and development expense. + References No definition available. + Details
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- Definition The amount of compensation earned (contract income) under a research and development arrangement accounted for as a contract to perform research and development for others. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6420387&loc=d3e23221-108380 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380 + Details
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