Operating Matters and Liquidity - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			1 Months Ended		1 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 29, 2012 Series B Preferred Stock	Jun. 30, 2012 Series B Preferred Stock	Jun. 29, 2012 Extended Maturity
Line of Credit Facility [Line Items]
Net loss	$ (1,229,834)	$ (1,212,267)	$ (2,644,540)	$ (2,467,978)
Accumulated deficit	(105,221,121)		(105,221,121)		(102,576,581)
Current notes payable	14,316,255		14,316,255		13,000,000
Extended date of the credit facility								Nov. 30, 2012
Convertible preferred stock, shares issued	5,500,000		5,500,000		5,000,000	500,000	500,000
Net Proceeds from issuance of Series B Convertible preferred Stock						$ 2,750,000