Subsequent Events	3 Months Ended
Mar. 31, 2021
Subsequent events
Subsequent events	12. Subsequent events On April 28, 2021, the Company sold 1,000,000 shares of the Company’s common stock in a private placement at a price of $27.00 per share for gross proceeds of $27.0 million. In connection with the private placement, the Company also issued Series B Warrants (the Series B Warrants) to purchase 500,000 shares of common stock. The Series B Warrants are exercisable at any time, have an exercise price of $45.00 per share and will terminate at the earlier of (i) three years from the date of issuance and (ii) upon liquidation or deemed liquidation of the Company. The Series B Warrants are callable by the Company in certain circumstances.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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