Fixed Assets - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2012	Jun. 30, 2012	Jun. 30, 2011
Property, Plant and Equipment [Line Items]
Depreciation expense		$ 114,000	$ 194,000
Proceeds from sale of machinery	$ 70,000	$ 70,000