Summary of significant accounting policies - Sources of Liquidity and Funding Requirements (Details) - USD ($) $ in Thousands |
1 Months Ended | |||||
|---|---|---|---|---|---|---|
Apr. 30, 2019 |
Oct. 31, 2020 |
Jul. 31, 2020 |
May 31, 2019 |
Mar. 31, 2021 |
Dec. 31, 2020 |
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| Summary of significant accounting policies | ||||||
| Net proceeds from convertible preferred shares to accredited investors | $ 138,800 | |||||
| Net proceeds from issuance of common shares in Initial Public Offering | $ 85,400 | |||||
| Net proceeds from issuance of pre-funded warrants in a private placement | $ 24,800 | |||||
| Net proceeds from offering of common shares and pre-funded warrants | $ 48,200 | |||||
| Cash, cash equivalents and short-term investments | $ 129,900 | |||||
| Accumulated deficit | $ (175,980) | $ (163,466) | ||||
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- Definition The cash inflow to the entity from common shares and pre-funded warrants. No definition available.
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- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price in a private placement. No definition available.
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- References No definition available.
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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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