PROPERTY AND EQUIPMENT - Property and Equipment and Related Accumulated Depreciation (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,009	$ 1,004
Less: accumulated depreciation	(966)	(881)
Total Property and Equipment, Net	43	123
Lab equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	569	570
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16	16
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	99	97
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	32	28
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 293	$ 293

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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