Income Taxes - Valuation Allowance and Tax Reforms (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Valuation allowance
Research and development expenses	$ 37,873,000
Uncertain tax positions
Interest and penalties pertaining to uncertain tax positions	0	$ 0
AUSTRALIA
Valuation allowance
Deferred tax assets valuation allowance	$ 14,886	$ 12,413