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Summary of Significant Accounting Policies (Details Narrative)
$ in Thousands
12 Months Ended
Jul. 31, 2018
USD ($)
Number
Jul. 31, 2017
USD ($)
Jul. 31, 2016
USD ($)
Cash $ 90 $ 11 $ 87
Inventories written down value 99  
Advertising and promotional costs  
Warranty costs  
Number of Reportable Segments | Number 1    
Accrued Warranty $ 12 $ 12  
Exer-Rest Products [Member] | Domestic [Member]      
Product warranties period 2 years    
Exer-Rest Products [Member] | U.S. Outside [Member]      
Product warranties period 1 year    
Minimum [Member]      
Income tax examination year under examination 2015    
Maximum [Member]      
Income tax examination year under examination 2018