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Consolidated Balance Sheets (Parenthetical) (USD $)
May 31, 2013
May 31, 2012
Accounts receivable, allowance $ 900,000 $ 800,000
Customer based intangibles, accumulated amortization 9,446,000 7,111,000
Other non-current assets, accumulated amortization $ 4,222,000 $ 3,578,000
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 24,056,014 23,619,761
Common stock, shares outstanding 24,056,014 23,619,761