Notes Payable and Debt - Summary of Notes Payable to Significant Stockholder (Parenthetical) (Detail)	Sep. 30, 2013	Dec. 31, 2012
Unsecured Demand Note Payable; Interest Rate of 7%: Issued December 2009 [Member]
Short-term Debt [Line Items]
Interest rate of notes payable	7.00%	7.00%
Unsecured Demand Notes Payable; Interest Rate of 7%: Issued January 2010 - December 2010 [Member]
Short-term Debt [Line Items]
Interest rate of notes payable	7.00%	7.00%
Unsecured Demand Notes Payable; Interest Rate of 7%: Issued January 2011 - December 2011 [Member]
Short-term Debt [Line Items]
Interest rate of notes payable	7.00%	7.00%
Unsecured Demand Notes Payable; Interest Rate of 7%: Issued January 2012 - December 2012 [Member]
Short-term Debt [Line Items]
Interest rate of notes payable	7.00%	7.00%
Unsecured Demand Notes Payable; Interest Rate of 7%: Issued January 2013 - September 2013 [Member]
Short-term Debt [Line Items]
Interest rate of notes payable	7.00%	7.00%