13. Equity (Detail) - (Table 3) Table of Stock Options Outstanding and Exercisable (USD $)	12 Months Ended
	Dec. 31, 2012
Number of Options Outstanding	625,000
Number of Options Exercisable	464,167
Exercise Price Range $2.00 - $2.50 [Member]
Exercise Price Range	2.00 - 2.50
Number of Options Outstanding	330,000
Weighted Average Remaining Contractual Life Outstanding Options	5 years 146 days
Weighted Average Exercise Price Outstanding Options (in Dollars per share)	$ 2.02
Weighted Average Remaining Contractual Life Exercisable Options	4 years 328 days
Weighted Average Exercise Price Exercisable Options (in Dollars per share)	$ 2.03
Number of Options Exercisable	197,500
Exercise Price Range $4.00 - $4.30 [Member]
Exercise Price Range	4.00 - 4.30
Number of Options Outstanding	232,500
Weighted Average Remaining Contractual Life Outstanding Options	3 years 328 days
Weighted Average Exercise Price Outstanding Options (in Dollars per share)	$ 4.08
Weighted Average Remaining Contractual Life Exercisable Options	3 years 328 days
Weighted Average Exercise Price Exercisable Options (in Dollars per share)	$ 4.08
Number of Options Exercisable	232,500
Exercise Price at $6.58 [Member]
Exercise Price Range	6.58
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life Outstanding Options	7 years 6 months
Weighted Average Exercise Price Outstanding Options (in Dollars per share)	$ 6.58
Weighted Average Remaining Contractual Life Exercisable Options	7 years 6 months
Weighted Average Exercise Price Exercisable Options (in Dollars per share)	$ 6.58
Number of Options Exercisable	26,667
Exercise Price Range $8.60 - $8.88 [Member]
Exercise Price Range	8.60 - 8.88
Number of Options Outstanding	22,500
Weighted Average Remaining Contractual Life Outstanding Options	8 years 6 months
Weighted Average Exercise Price Outstanding Options (in Dollars per share)	$ 8.65
Weighted Average Remaining Contractual Life Exercisable Options	8 years 6 months
Weighted Average Exercise Price Exercisable Options (in Dollars per share)	$ 8.65
Number of Options Exercisable	7,500