Property and Equipment - Summarized Category of Fixed Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	$ 6,157	$ 5,575
Less accumulated depreciation	(1,852)	(1,685)
Total property, plant & equipment, net	4,305	3,890
Idle Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	4,971	4,432
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	570	680
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	373	344
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	190	110
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant & equipment, gross	$ 53	$ 9