Summary of Significant Accounting Policies - Summary of Estimated Lives of Assets (Detail)	12 Months Ended
	Dec. 31, 2014
Machinery and Manufacturing Equipment [Member]
Change in Accounting Estimate [Line Items]
Property, plant and equipment, useful life	5 years
Computer Equipment [Member]
Change in Accounting Estimate [Line Items]
Property, plant and equipment, useful life	3 years
Furniture [Member]
Change in Accounting Estimate [Line Items]
Property, plant and equipment, useful life	5 years
Minimum [Member] | Leasehold Improvements [Member]
Change in Accounting Estimate [Line Items]
Property, plant and equipment, useful life	3 years
Maximum [Member] | Leasehold Improvements [Member]
Change in Accounting Estimate [Line Items]
Property, plant and equipment, useful life	10 years