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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Beginning Balance at May. 31, 2021 $ 840,377 $ 17,195 $ 294,953 $ (11,375) $ 539,604
Beginning Balance (in shares) at May. 31, 2021   107,468,000      
Exercise of options and share-based compensation expense 1,839 $ 1 1,838 0 0
Exercise of options and share-based compensation expense (in shares)   6,000      
Issuance of shares under employee stock purchase plan 899 $ 3 896 0 0
Issuance of shares under employee stock purchase plan (in shares)   19,000      
Net income 17,077     0 17,077
Other comprehensive income(loss) (4,829)     (4,829) 0
Ending Balance at Aug. 31, 2021 855,363 $ 17,199 297,687 (16,204) 556,681
Ending Balance (in shares) at Aug. 31, 2021   107,493,000      
Beginning Balance at May. 31, 2022 $ 887,374 $ 17,248 309,984 (27,769) 587,911
Beginning Balance (in shares) at May. 31, 2022 107,801,094 107,801,000      
Exercise of options and share-based compensation expense $ 1,905 $ 1 1,904 0 0
Exercise of options and share-based compensation expense (in shares)   4,000      
Issuance of shares under employee stock purchase plan 867 $ 5 862 0 0
Issuance of shares under employee stock purchase plan (in shares)   33,000      
Net income 5,209 $ 0 0 0 5,209
Other comprehensive income(loss) (11,557) 0 0 (11,557) 0
Ending Balance at Aug. 31, 2022 $ 883,798 $ 17,254 $ 312,750 $ (39,326) $ 593,120
Ending Balance (in shares) at Aug. 31, 2022 107,837,730 107,838,000