13. Equity (Detail) (USD $)	1 Months Ended			12 Months Ended									1 Months Ended	12 Months Ended		1 Months Ended
	Sep. 30, 2012	Feb. 29, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Original Preferred Shares [Member]	Dec. 31, 2012 The 2012 Plan [Member]	Dec. 31, 2012 The 2010 Plan [Member]	Jun. 30, 2010 The 2010 Plan [Member]	Dec. 31, 2012 The 2007 Plan [Member] Restricted Stock [Member]	Dec. 31, 2012 The 2007 Plan [Member]	Dec. 31, 2012 The 2000 Plan [Member]	Dec. 31, 2012 Private Equity Transaction [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Feb. 29, 2012 Restricted Stock [Member]	Sep. 30, 2012 Stock Options [Member]
Preferred Stock, Liquidation Preference, Value (in Dollars)						$ (13,200,000)
Loss On Reissuance Of Preferred Shares (in Dollars)					(6,906,566)
Stock Issued During Period, Shares, New Issues		82,647	379,406										214,286
Gains (Losses) on Extinguishment of Debt (in Dollars)			(300,000)	(422,435)	(2,749,533)
Debt Instrument, Convertible, Conversion Price (in Dollars per share)		$ 1.93
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period																18,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period																	625,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price (in Dollars per share)																	$ 7.48
Shares Issued In Exchange For Warrants	55,000
Per Share Fair Value Of Common Stock, Warrant Exchange (in Dollars per share)	$ 2.00
Number of Warrants Exchanged For Common Stock (in Dollars per share)	$ 234,000
Sale of Stock, Price Per Share (in Dollars per share)													$ 1.40
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized							1,775,000		2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number							20,000	320,000		137,500	102,500	182,500
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant								1,661,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)				200,000	18,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)				$ 2.00	$ 5.67
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options (in Dollars)				$ 600,000										$ 100,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				7 years 219 days										328 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value (in Dollars per share)														$ 0	$ 600,000
Share-based Compensation Arrangement by Share-based Payment Award, Description				Warrants are exercisable at the grant date and generally expire 5 to 10years from the date of the grant