Property Plant and Equipment - Schedule of Property Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	$ 17,440	$ 16,512
Less: accumulated depreciation	(7,143)	(5,495)
Net property and equipment	10,297	11,017
Land [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	763	763
Buildings [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	8,342	8,313
Machinery and equipment [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	6,017	5,526
Furniture and fixtures [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	466	466
Leasehold improvements [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	717	405
Computer software and equipment [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	940	817
Motor vehicles [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	161	222
Construction in Progress [Member]
Cost And Accumulated Depreciation And Amortization Of Property Plant And Equipment [Line Items]
Property Plant and Equipment Gross	$ 34