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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Feb. 28, 2013
May 31, 2012
Accounts receivable, allowance $ 850 $ 800
Customer based intangibles, accumulated amortization 8,434 7,111
Other non-current assets, accumulated amortization $ 4,335 $ 3,578
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Common stock, par value $ 0.16 $ 0.16
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares issued 23,921,841 23,619,761
Common stock, shares outstanding 23,921,841 23,619,761