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Stock-Based Compensation (Details) (2007 Plan [Member], USD $)
3 Months Ended
Jun. 30, 2012
2007 Plan [Member]
 
Restricted stock activity  
Unvested as of April 1, 2012, Shares 139,901
Unvested as of April 1, 2012, Weighted-Average Grant-Date Fair Value $ 4.00
Vested, Shares (4,000)
Vested, Weighted-Average Grant-Date Fair Value $ 4.79
Unvested as of June 30, 2012, Shares 135,901
Unvested as of June 30, 2012, Weighted-Average Grant-Date Fair Value $ 3.98