Cash Proceeds Along with Fair Value Disclosures Related to Grants, Exercises, and Vested Options (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | |||||||
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Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||||||||
| Proceeds from stock options exercised | $ 54 | $ 44 | $ 310 | ||||||
| Tax benefit related to stock options exercised | [1] | ||||||||
| Intrinsic value of stock options exercised | [2] | $ 13 | $ 52 | $ 108 | |||||
| Weighted-average fair value of options granted | $ 1.22 | $ 1.35 | $ 1.45 | $ 1.62 | |||||
| Total fair value of shares vested during the period | $ 482 | $ 273 | $ 1,204 | $ 921 | |||||
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- Definition The cash inflow associated with the amount received from holders exercising their stock options and warrants. No definition available.
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| X | ||||||||||
- Definition Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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