Quarterly report pursuant to Section 13 or 15(d)

Cash Proceeds Along with Fair Value Disclosures Related to Grants, Exercises, and Vesting Options (Detail)

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Cash Proceeds Along with Fair Value Disclosures Related to Grants, Exercises, and Vesting Options (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Proceeds from stock options exercised $ 54 $ 10 $ 310 $ 707
Intrinsic value of stock options exercised 13 [1] 6 [1] 108 [1] 860 [1]
Weighted-average fair value of options granted during period $ 1.35 $ 3.31 $ 1.62 $ 3.90
Total fair value of shares vested during the period $ 273 $ 437 $ 921 $ 1,155
[1] The intrinsic value of stock options exercised is the amount by which the market price of the stock on the date of exercise exceeded the market price of the stock on the date of grant.