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Consolidated Statements Of Shareholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Treasury Stock [Member]
Total
Beginning balance, shares at Aug. 31, 2016 27,056,000       13,332,000  
Beginning balance at Aug. 31, 2016 $ 1,353 $ 211,203 $ 76,628 $ 1,222 $ (196,691)  
Issuance of common stock from treasury, shares         188,000  
Issuance of common stock from treasury   (2,103)     $ 2,785  
Purchase of treasury shares, shares         (300,000)  
Purchase of treasury shares         $ (5,431)  
Restricted share award, shares         30,000  
Restricted share award   (442)     $ 442  
Stock-based compensation   3,658        
Cumulative translation adjustments       (555)   $ (555)
Tax benefit recorded in paid-in capital   168        
Net loss     (7,172)     (7,172)
Ending balance, shares at Aug. 31, 2017 27,056,000       13,414,000  
Ending balance at Aug. 31, 2017 $ 1,353 212,484 69,456 667 $ (198,895)  
Issuance of common stock from treasury, shares         337,000  
Issuance of common stock from treasury   (3,702)     $ 4,510  
Purchase of treasury shares, shares         (105,000)  
Purchase of treasury shares         $ (2,006)  
Restricted share award, shares         23,000  
Restricted share award   (348)     $ 348  
Stock-based compensation   2,846        
Cumulative translation adjustments       (326)   (326)
Net loss     (5,887)     (5,887)
Ending balance, shares at Aug. 31, 2018 27,056,000       13,159,000  
Ending balance at Aug. 31, 2018 $ 1,353 211,280 63,569 341 $ (196,043) $ 80,500
Issuance of common stock from treasury, shares         43,000 72,787
Issuance of common stock from treasury   321     $ 654  
Purchase of treasury shares, shares         (1,000)  
Purchase of treasury shares         $ (12)  
Restricted share award, shares         28,000  
Restricted share award   (426)     $ 426  
Stock-based compensation   4,789        
Cumulative translation adjustments       (72)   $ (72)
Net loss     (1,023)     (1,023)
Ending balance, shares at Aug. 31, 2019 27,056,000       13,087,000  
Ending balance at Aug. 31, 2019 $ 1,353 $ 215,964 59,403 $ 269 $ (194,975) $ 82,014
Cumulative effect of new accounting principle     $ (3,143)