13. Equity (Detail) - (Table 6) Table of Warrant Activity (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common Share Warrants [Member]
Outstanding Warrants, Common Shares	1,981,661	2,219,546	370,064
Common Share Warrants Issued	5,300	1,825,762
Common Share Warrants Expired	(9,166)	(4,524)
Conversion to Common Stock	(234,019)
Reclassification of preferred warrant		50,000
Other		(21,756)
Weighted Average Exercise Price, Common Share Warants [Member]
Weighted Average Exercise Price, Common Share Warrants (in Dollars per Item)	5.75	5.84	7.16
Weighted Average Exercise Price, Commons Shares Warrants Issued (in Dollars per share)	5.04	5.66
Weighted Average Exercise Price, Common Share Warrants Expired (in Dollars per share)	6.30	6.30
Conversion to Common Stock (in Dollars per share)	6.77
Reclassification of preferred warrant (in Dollars per share)		4.00
Other (in Dollars per share)		8.26
Preferred Share Warrants [Member]
Outstanding Warrants, Preferred Shares			100,000
Reclassification of preferred warrant		(100,000)
Weighted Average Exercise Price, Preferred Share Warrants [Member]
Weighted Average Exercise Price, Preferred Share Warrants (in Dollars per share)			2.00
Reclassification of preferred warrant (in Dollars per share)		2.00