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Stock-Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Stock-based compensation expense $ 22 $ 97
Excess tax expense related to stock-based compensation 26 83
Unrecognized stock-based compensation expense $ 148 $ 257
Weighted average period unrecognized expense is expected to be recognized 2 years 1 month 6 days 2 years 3 months 18 days