PROPERTY AND EQUIPMENT - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment	$ 8,998	$ 9,234
Less accumulated depreciation	(6,655)	(6,084)
Property and equipment, net	2,343	3,150
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment	3,167	3,206
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	821	834
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	1,113	1,274
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 3,897	$ 3,920

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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