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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Statement Of Financial Position [Abstract]    
Allowances on trade accounts receivable $ 39 $ 33
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 500 500
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 25,500 25,500
Common stock, shares issued 10,376 10,331
Treasury stock, shares 317 327