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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Nov. 30, 2020
May 31, 2020
Accounts receivable, allowance $ 1,350 $ 1,350
Accumulated Amortization $ 48,546 $ 44,690
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 120,000,000 120,000,000
Common stock, shares issued 53,244,057 52,945,841
Common stock, shares outstanding 53,244,057 52,945,841