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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Feb. 29, 2016
May. 31, 2015
Accounts receivable, allowance $ 1,450 $ 1,300
Customer based intangibles, accumulated amortization 15,794 14,446
Other non-current assets, accumulated amortization $ 8,187 $ 7,191
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.16 $ 0.16
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares issued 37,523,740 37,128,269
Common stock, shares outstanding 37,523,740 37,128,269