Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Income Taxes Disclosure [Line Items]
Gain on sale of Aquinox Canada		$ 7,826	$ 0
Net operating losses carried forward for tax purposes		58,100	25,500
Operating loss carryforwards subject to expiration		1,700
Operating loss carryforwards not subject to expiration		56,400
Increase (decrease) in valuation allowance		(42,900)	600
Research Tax Credit Carryforward
Income Taxes Disclosure [Line Items]
Tax credits for research and development		$ 1,000	$ 200
Acqinox Canada
Income Taxes Disclosure [Line Items]
Gain on sale of Aquinox Canada	$ 7,800
Tax attributes no longer reflected in deferred tax assets and valuation allowance	$ 51,700