INCOME TAXES - Schedule of Credit Carryforwards (Details) $ in Millions	Dec. 31, 2022 USD ($)
United States: | Federal
Income Taxes [Line Items]
NOL carryforwards	$ 117.7
United States: | State
Income Taxes [Line Items]
NOL carryforwards	138.4
Indefinite | United States: | Federal
Income Taxes [Line Items]
NOL carryforwards	101.2
R&D credit carryforwards | United States: | Federal
Income Taxes [Line Items]
Tax credit carryforwards	2.6
R&D credit carryforwards | United States: | State
Income Taxes [Line Items]
Tax credit carryforwards	0.9
R&D credit carryforwards | Canada
Income Taxes [Line Items]
Tax credit carryforwards	5.1
Non-capital loss carryforwards | Canada
Income Taxes [Line Items]
Tax credit carryforwards	43.2
Investment tax credit carryforwards | Canada
Income Taxes [Line Items]
Tax credit carryforwards	$ 1.2