Principal Business Activity and Significant Accounting Policies - Convertible Debt (Details) $ in Millions	May 19, 2020 USD ($)
Convertible Notes Payable
Debt
Aggregate principal amount	$ 143.8

Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant