Organization - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011		Dec. 31, 2010
Organization and Nature of Operations [Line Items]
Number of products			1
Sales of product manufactured by a third party	$ 106,000	$ 7,000	$ 130,000	$ 14,000
Cash and cash equivalents	5,000		5,000		15,000	[1]	13,000
Third Party
Organization and Nature of Operations [Line Items]
Sales of product manufactured by a third party			$ 119,000

[1] Derived from audited information