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Stock Based Compensation Plans And Warrants - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum range of exercise prices for outstanding options $ 2.00
Maximum range of exercise prices for outstanding options $ 60.92
Minimum range of exercise prices for options exercisable $ 2.00
Maximum range of exercise prices for options exercisable $ 60.92
Weighted average remaining contractual life of options outstanding (years) 4 years 6 months
Recognized compensation cost $ 1.92
Total unrecognized compensation cost related to non-vested stock options $ 1.2
Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 1 year
Costs are expected to be recognized over period 2012
Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 3 years
Costs are expected to be recognized over period 2014