SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Calculation of Basic and Diluted Net Income Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Disclosure Calculation Of Basic And Diluted Net Income Per Share [Abstract]
Net income	$ 1,015	$ 535	$ 10,906
Weighted average shares – basic (in shares)	28,239,945	25,991,914	17,581,887
Effect of dilutive potential common shares (in shares)	2,912,979	2,911,955	3,693,600
Weighted average shares – diluted (in shares)	31,152,924	28,903,869	21,275,487
Net income per share - basic (usd per share)	$ 0.04	$ 0.02	$ 0.62
Net income per share - diluted (usd per share)	$ 0.03	$ 0.02	$ 0.51
Anti-dilutive share-based awards, excluded (in shares)	796,000	768,000	0
Outstanding options and warrants, total (in shares)	7,825,000	6,828,000	6,401,000