13. Equity (Detail) - (Table 2) Table of Stock Option Activity (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Shares [Member]
Outstanding Options	2,201,774	2,045,524
Vested or expected to vest at December 31, 2012	612,500
Exercisable at December 31, 2012	464,167
Granted Options	317,500	185,000
Exercised Options	(161,400)	(4,250)
Forfeited or expired options	(1,732,874)	(24,500)
Outstanding Options	625,000	2,201,774
Weighted Average Exercise Price [Member]
Outstanding Options (in Dollars per share)	5.78	5.52
Vested or expected to vest at December 31, 2012 (in Dollars per share)	3.32
Exercisable at December 31, 2012 (in Dollars per share)	3.43
Granted Options (in Dollars per share)	2.00	8.72
Exercised Options (in Dollars per share)	0.13	4.04
Forfeited or expired options (in Dollars per share)	6.51	5.93
Outstanding Options (in Dollars per share)	3.32	5.78
Weighted Average Remaining Contractual Term [Member]
Outstanding Options	5 years 36 days
Vested or expected to vest at December 31, 2012	5 years 36 days
Exercisable at December 31, 2012	4 years 219 days
Outstanding Options	5 years 36 days