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Shareholders' Equity, Reconciliation of Changes in Shareholders' Equity (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 02, 2019
Oct. 27, 2018
Jul. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance $ 33,775    
Net (loss) income (1,400) $ (115)  
Foreign currency translation adjustments (214) (127)  
Balance 32,196    
Common Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance 32 30  
Balance (Adjusted)   30  
Net (loss) income 0 0  
Foreign currency translation adjustments 0 0  
Conversion of Class B common stock to Class A common stock   1  
Issuance of stock under stock award plan   0  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests 0 0  
Balance 32 31  
Common Stock [Member] | Class A Common Stock [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     $ 0
Common Stock [Member] | Class B Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance 12 14  
Balance (Adjusted)   14  
Net (loss) income 0 0  
Foreign currency translation adjustments 0 0  
Conversion of Class B common stock to Class A common stock   (1)  
Issuance of stock under stock award plan   0  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests 0 0  
Balance 12 13  
Common Stock [Member] | Class B Common Stock [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     0
Capital in Excess of Par Value [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance 16,964 17,558  
Balance (Adjusted)   17,558  
Net (loss) income 0 0  
Foreign currency translation adjustments 0 0  
Conversion of Class B common stock to Class A common stock   0  
Issuance of stock under stock award plan   4  
Share-based compensation expense 34 33  
Distributions to noncontrolling interests 0 0  
Balance 16,998 17,595  
Capital in Excess of Par Value [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     0
Retained Earnings [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance 18,687 20,973  
Balance (Adjusted)   20,968  
Net (loss) income (1,527) (120)  
Foreign currency translation adjustments 0 0  
Conversion of Class B common stock to Class A common stock   0  
Issuance of stock under stock award plan   0  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests 0 0  
Balance 17,160 20,848  
Retained Earnings [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     (5)
Accumulated Other Comprehensive Income (Loss) [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance (2,098) (1,885)  
Balance (Adjusted)   (1,880)  
Net (loss) income 0 0  
Foreign currency translation adjustments (175) (67)  
Conversion of Class B common stock to Class A common stock   0  
Issuance of stock under stock award plan   0  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests 0 0  
Balance (2,273) (1,947)  
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     5
Treasury Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance (729) (907)  
Balance (Adjusted)   (907)  
Net (loss) income 0 0  
Foreign currency translation adjustments 0 0  
Conversion of Class B common stock to Class A common stock   0  
Issuance of stock under stock award plan   23  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests 0 0  
Balance (729) (884)  
Treasury Stock [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     0
Noncontrolling Interests [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance 907 664  
Balance (Adjusted)   664  
Net (loss) income 127 5  
Foreign currency translation adjustments (39) (60)  
Conversion of Class B common stock to Class A common stock   0  
Issuance of stock under stock award plan   0  
Share-based compensation expense 0 0  
Distributions to noncontrolling interests (6) (4)  
Purchase of additional noncontrolling interests 7    
Balance $ 996 $ 605  
Noncontrolling Interests [Member] | ASU 2016-01 [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cumulative effect of adoption of ASU 2016-01     $ 0