Fair Value of Stock Consideration (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2012
Commitments and Contingencies [Line Items]
Number of Shares	901,000	3,002,778
Final Fair Value of Stock Consideration		$ 6,492,056
Derivative Actions
Commitments and Contingencies [Line Items]
Number of Shares		225,000
Closing Price Per Share on Final Approval Date		$ 1.94
Final Fair Value of Stock Consideration		436,500
Securities Action
Commitments and Contingencies [Line Items]
Number of Shares		2,777,778
Closing Price Per Share on Final Approval Date		$ 2.18
Final Fair Value of Stock Consideration		$ 6,055,556