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Shareholders' equity (Details) - USD ($) $ / shares in Units, $ in Thousands		2 Months Ended	3 Months Ended	6 Months Ended
	Mar. 01, 2021	Apr. 30, 2021	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Aggregate offering price			$ 1,865	$ 29,564
Additional paid-in-capital			1,062,234	1,062,234	$ 1,016,018
Cash consideration paid				46,300
Sales Agreement with SVB Leerink LLC
Percentage of gross proceeds	3.00%
Net proceeds		$ 29,600
Sales Agreement with SVB Leerink LLC | Direct Incremental Labor
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs			$ 300	$ 1,300
Sales Agreement with SVB Leerink LLC | Ordinary shares
Shares issued in connection with offering		921,730
Share price (in dollars per share)		$ 33.52
Sales Agreement with SVB Leerink LLC | Maximum
Aggregate offering price	$ 200,000

X

- Definition

The amount of net proceeds from the issue of shares.

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- Definition

Percentage of gross proceeds of shares sold.

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- Definition

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

+ References

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- Definition

Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Price of a single share of a number of saleable stocks of a company.

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Number of new stock issued during the period.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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