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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Total
Beginning balance at Aug. 31, 2018 $ 20 $ 153,469 $ 351,266 $ (27,636) $ (321,630) $ 155,489
Beginning balance, shares at Aug. 31, 2018 19,729,774       5,879,361  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (2,425)       (2,425)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 24,062          
Stock-based compensation   1,965       1,965
Cash dividends     (7,522)     (7,522)
Acquisition of treasury stock         $ (6,863) (6,863)
Acquisition of treasury stock, shares         41,184  
Foreign currency translation adjustment       (1,631)   (1,631)
Net income     13,279     13,279
Ending balance at Nov. 30, 2018 $ 20 153,009 356,699 (29,267) $ (328,493) 151,968
Ending balance, shares at Nov. 30, 2018 19,753,836       5,920,545  
Beginning balance at Aug. 31, 2018 $ 20 153,469 351,266 (27,636) $ (321,630) 155,489
Beginning balance, shares at Aug. 31, 2018 19,729,774       5,879,361  
Foreign currency translation adjustment           (3,724)
Net income           47,324
Ending balance at May. 31, 2019 $ 20 154,983 373,896 (31,458) $ (344,014) 153,427
Ending balance, shares at May. 31, 2019 19,770,339       6,011,545  
Cumulative effect of change in accounting principle     (324)     (324)
Beginning balance at Nov. 30, 2018 $ 20 153,009 356,699 (29,267) $ (328,493) 151,968
Beginning balance, shares at Nov. 30, 2018 19,753,836       5,920,545  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (8)       (8)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 16,503          
Stock-based compensation   1,393       1,393
Cash dividends     (8,489)     (8,489)
Acquisition of treasury stock         $ (5,198) (5,198)
Acquisition of treasury stock, shares         29,500  
Foreign currency translation adjustment       313   313
Net income     15,906     15,906
Ending balance at Feb. 28, 2019 $ 20 154,394 364,116 (28,954) $ (333,691) 155,885
Ending balance, shares at Feb. 28, 2019 19,770,339       5,950,045  
Stock-based compensation   589       589
Cash dividends     (8,457)     (8,457)
Acquisition of treasury stock         $ (10,323) (10,323)
Acquisition of treasury stock, shares         61,500  
Foreign currency translation adjustment       (2,406)   (2,406)
Net income     18,139     18,139
Ending balance at May. 31, 2019 $ 20 154,983 373,896 (31,458) $ (344,014) 153,427
Ending balance, shares at May. 31, 2019 19,770,339       6,011,545  
Cumulative effect of change in accounting principle     98 (98)    
Beginning balance at Aug. 31, 2019 $ 20 155,132 374,060 (32,482) $ (351,255) $ 145,475
Beginning balance, shares at Aug. 31, 2019 19,773,977       6,055,316 13,718,661
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (2,640)       $ (2,640)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 22,342          
Stock-based compensation   2,214       2,214
Cash dividends     (8,406)     (8,406)
Acquisition of treasury stock         $ (4,957) (4,957)
Acquisition of treasury stock, shares         26,800  
Foreign currency translation adjustment       2,112   2,112
Net income     12,194     12,194
Ending balance at Nov. 30, 2019 $ 20 154,706 377,848 (30,370) $ (356,212) 145,992
Ending balance, shares at Nov. 30, 2019 19,796,319       6,082,116  
Beginning balance at Aug. 31, 2019 $ 20 155,132 374,060 (32,482) $ (351,255) $ 145,475
Beginning balance, shares at Aug. 31, 2019 19,773,977       6,055,316 13,718,661
Foreign currency translation adjustment           $ 159
Net income           41,045
Ending balance at May. 31, 2020 $ 20 157,101 388,265 (32,323) $ (368,080) $ 144,983
Ending balance, shares at May. 31, 2020 19,812,685       6,147,899 13,664,786
Beginning balance at Nov. 30, 2019 $ 20 154,706 377,848 (30,370) $ (356,212) $ 145,992
Beginning balance, shares at Nov. 30, 2019 19,796,319       6,082,116  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 16,366          
Stock-based compensation   1,675       1,675
Cash dividends     (9,236)     (9,236)
Acquisition of treasury stock         $ (4,701) (4,701)
Acquisition of treasury stock, shares         24,774  
Foreign currency translation adjustment       (98)   (98)
Net income     14,327     14,327
Ending balance at Feb. 29, 2020 $ 20 156,381 382,939 (30,468) $ (360,913) 147,959
Ending balance, shares at Feb. 29, 2020 19,812,685       6,106,890  
Stock-based compensation   720       720
Cash dividends     (9,198)     (9,198)
Acquisition of treasury stock         $ (7,167) (7,167)
Acquisition of treasury stock, shares         41,009  
Foreign currency translation adjustment       (1,855)   (1,855)
Net income     14,524     14,524
Ending balance at May. 31, 2020 $ 20 $ 157,101 $ 388,265 $ (32,323) $ (368,080) $ 144,983
Ending balance, shares at May. 31, 2020 19,812,685       6,147,899 13,664,786