Ten Percent Convertible Redeemable Preferred Stock - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended		2 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended
	Nov. 10, 2004	Apr. 30, 2013	Feb. 28, 2013	Apr. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013 Subsequent Event	Jun. 30, 2013 10% Convertible Preferred Stock	Dec. 31, 2012 10% Convertible Preferred Stock	Dec. 31, 2011 10% Convertible Preferred Stock	Apr. 30, 2011 Preferred Stock	Jun. 30, 2013 Beneficial Conversion Feature	Jun. 30, 2012 Beneficial Conversion Feature	Jun. 30, 2013 Beneficial Conversion Feature	Jun. 30, 2012 Beneficial Conversion Feature	Dec. 31, 2012 Beneficial Conversion Feature	Jun. 30, 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
Warrant exercise price							1		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
10% Convertible preferred stock, unamortized discount												828,300	681,860		681,860
Conversion rate at issuance							2,100,000
Amortization of preferred stock discount					0	68,346							226,457	300,904	455,758	543,027
Common stock issued upon conversion Preferred Stock, shares	1,701,341		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		266,954			342,857
Shares issued for dividend payments		$ 181,529			$ 181,529			$ 174,857
Shares of stock called by warrants									58,352