Annual report pursuant to Section 13 and 15(d)

Asset Sales (Details)

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Asset Sales (Details) (USD $)
3 Months Ended 12 Months Ended
Sep. 30, 2010
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Asset Sales        
Net (gains)/losses incurred due to the obsolescence and disposal of fixed assets   $ 18,000 $ 300,000 $ 300,000
Proceeds from sale of building and related equipment 3,400,000 398,000 74,000 5,425,000
Net gain on sale of building and related equipment $ 1,600,000