Ten Percent Convertible Redeemable Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended			2 Months Ended	12 Months Ended			1 Months Ended			12 Months Ended
	Jun. 30, 2012	May 31, 2012	Mar. 31, 2012	Apr. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Redeemable Preferred Stock	Dec. 31, 2012 10% Convertible Preferred Stock	Dec. 31, 2011 10% Convertible Preferred Stock	Feb. 28, 2011 10% Convertible Preferred Stock	Dec. 31, 2012 Beneficial Conversion Feature	Dec. 31, 2011 Beneficial Conversion Feature	Dec. 31, 2012 Minimum
Temporary Equity [Line Items]
10% Convertible preferred stock, authorized								880,000	880,000
10% Convertible preferred stock, stated value					$ 10
Minimum weighted average price of common stock for 60 consecutive trading days to convert preferred stock													$ 4
10% Convertible preferred stock, conversion rate					$ 1
Warrants expiration date					Dec. 31, 2015
Warrant exercise price					1		10
Shares of stock called by warrants							58,352
10% Convertible preferred stock, issued				759,773				706,023	752,273
10% Convertible preferred stock, issuance price per share				$ 1.00
10% Convertible preferred stock, gross proceeds from issuance				$ 7,597,730	$ 0	$ 6,769,390
10% Convertible preferred stock, unamortized discount				828,340							1,100,000
10% Convertible preferred stock, discount amortized period				3 years
Amortization of preferred stock discount					(405,839)	487,555					521,300	973,100
Common stock issued upon conversion Preferred Stock, shares	20,000	20,000	62,500					462,500	60,000	60,000	46,250	7,500	60,000
Common stock shares required to be issued if the remaining holders of Preferred Stock elect to convert					7,100,000
Conversion rate at issuance						2,100,000
Dividends accrued on common stock					$ 472,400