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Consolidated Statements Of Changes In 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, shares at Aug. 31, 2019 27,056,000       13,087,000  
Beginning balance at Aug. 31, 2019 $ 1,353 $ 215,964 $ 59,403 $ 269 $ (194,975)  
Issuance of common stock from treasury, shares         291,000  
Issuance of common stock from treasury   (3,138)     $ 4,184  
Purchase of common shares for treasury, shares         (400,000)  
Purchase of common shares for treasury         $ (13,971)  
Unvested share award, shares         21,000  
Unvested share award   (333)     $ 333  
Stock-based compensation   (573)        
Cumulative translation adjustments       372   $ 372
Net income (loss)     (9,435)     (9,435)
Ending balance, shares at Aug. 31, 2020 27,056,000       13,175,000  
Ending balance at Aug. 31, 2020 $ 1,353 211,920 49,968 641 $ (204,429)  
Issuance of common stock from treasury, shares         405,000  
Issuance of common stock from treasury   (5,213)     $ 6,286  
Purchase of common shares for treasury, shares         (147,000)  
Purchase of common shares for treasury         $ (2,971)  
Unvested share award, shares         28,000  
Unvested share award   (436)     $ 436  
Stock-based compensation   8,617        
Cumulative translation adjustments       68   68
Net income (loss)     13,623     13,623
Ending balance, shares at Aug. 31, 2021 27,056,000       (12,889,000)  
Ending balance at Aug. 31, 2021 $ 1,353 214,888 63,591 709 $ (200,678) $ 79,863
Issuance of common stock from treasury, shares         258,000 272,060
Issuance of common stock from treasury   (2,719)     $ 4,055  
Purchase of common shares for treasury, shares         (585,000) (499,411)
Purchase of common shares for treasury         $ (23,850)  
Unvested share award, shares         13,000  
Unvested share award   (209)     $ 209  
Stock-based compensation   8,286        
Cumulative translation adjustments       (1,251)   $ (1,251)
Net income (loss)     18,430     18,430
Ending balance, shares at Aug. 31, 2022 27,056,000       (13,203,000)  
Ending balance at Aug. 31, 2022 $ 1,353 $ 220,246 $ 82,021 $ (542) $ (220,264) $ 82,814