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COMMON STOCK AND COMMON STOCK PURCHASE WARRANTS - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended	9 Months Ended	1 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Common Stock	Jan. 24, 2011 Maximum
Class Of Warrant Or Right [Line Items]
Number of warrants exercised	125,000
Warrants to purchase shares of common stock	48,402		48,402
Warrants exercise price	$ 3.50
Share repurchase program authorized amount				$ 15,000,000
Shares repurchased under share repurchase program		264,047
Weighted average price of shares repurchased		$ 8.05
Value of shares repurchased under share repurchase program		$ 2,126,597
Share repurchase program, expiry date		Jan. 23, 2012

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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