Convertible Note - Finance Expense Related to the Convertible Notes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Amortization of debt discount	$ 925	$ (538)	$ 1,528	$ (1,078)	$ 3,260
the “Notes” | Convertible Debt
Debt Instrument [Line Items]
Amortization of debt discount	0	0	0	0	3,605
Amortization of debt issuance costs	976	0	1,685	0	333
Total finance expense recognized	$ 976	$ 0	$ 1,685	$ 0	$ 3,938