PROPERTY AND EQUIPMENT - SCHEDULE OF PROPERTY AND EQUIPMENT (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, total	$ 9,649	$ 9,578
Less accumulated depreciation	(5,794)	(5,562)
Property and equipment, net	3,855	4,016
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, total	3,530	3,489
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, total	873	882
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, total	1,290	1,290
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, total	$ 3,956	$ 3,917