Depreciation Computed Using Straight-Line Method (Detail)	12 Months Ended
	Dec. 31, 2014
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	2 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	5 years
Furniture and Fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	3 years
Furniture and Fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	10 years