Ten Percent Convertible Redeemable Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended	2 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended			3 Months Ended		12 Months Ended	3 Months Ended
	Feb. 28, 2013	Apr. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Mar. 31, 2013 10% Convertible Preferred Stock	Dec. 31, 2012 10% Convertible Preferred Stock	Dec. 31, 2011 10% Convertible Preferred Stock	Mar. 31, 2013 Preferred Stock	Mar. 31, 2013 Beneficial Conversion Feature	Mar. 31, 2012 Beneficial Conversion Feature	Dec. 31, 2012 Beneficial Conversion Feature	Mar. 31, 2013 Minimum
Temporary Equity [Line Items]
10% Convertible preferred stock, authorized							880,000	880,000	880,000
10% Convertible preferred stock, stated value					$ 10.00
Minimum weighted average price of common stock for 60 consecutive trading days to convert preferred stock														$ 4.00
10% Convertible preferred stock, conversion rate					$ 1.00
Warrants expiration date					Dec. 31, 2015
Warrant exercise price					1.00		10
10% Convertible preferred stock, issued		759,773					702,123	706,023
10% Convertible preferred stock, issuance price per share		$ 10
10% Convertible preferred stock, gross proceeds from issuance		$ 7,597,730	$ 0
10% Convertible preferred stock, unamortized discount										828,300	908,300
Conversion rate at issuance					2,100,000
Amortization of preferred stock discount			0	68,347							229,300	173,800
Common stock issued upon conversion Preferred Stock, shares	39,000						39,000	462,500
Preferred Stock shares converted	3,900										3,900		46,250
Common stock shares required to be issued if the remaining holders of Preferred Stock elect to convert			7,000,000
Common stock dividends, shares			267,000
Shares issued for dividend payments			$ 181,500
Shares of stock called by warrants							58,352