INCOME TAXES - Narrative (Detail)	Dec. 31, 2019 USD ($)
Income Taxes [Line Items]
Accrued interest or penalties related to uncertain tax positions	$ 25,000
Total amount of unrecognized tax benefits	97,000
Federal
Income Taxes [Line Items]
Net operating loss carryforwards	1,300,000
Tax credit carryforwards	8,300,000
State and local
Income Taxes [Line Items]
Net operating loss carryforwards	53,000,000
Tax credit carryforwards	2,400,000
Foreign tax authority | Ireland
Income Taxes [Line Items]
Net operating loss carryforwards	1,800,000
Full valuation allowance recorded against deferred tax asset	1,600,000
Foreign tax authority | Canada | Research and development
Income Taxes [Line Items]
Tax credit carryforwards	$ 1,700,000