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Related Parties (Narrative) (Details)
Apr. 30, 2018
USD ($)
$ / shares
shares
Apr. 30, 2019
USD ($)
Mar. 31, 2015
employee
Apr. 30, 2009
USD ($)
Related Party Transaction [Line Items]        
Amount owed by Petzila   $ 3,500,000    
Cash from sold assets to Wagz $ 350,000      
Fair value of non-cash consideration       $ 600,000
Executive [Member]        
Related Party Transaction [Line Items]        
Number of executive officers invested in a start-up customer | employee     2  
Maximum [Member] | Executive [Member]        
Related Party Transaction [Line Items]        
Executive officers' investment holding, percentage     2.00%  
Wagz [Member]        
Related Party Transaction [Line Items]        
Asset Purchase Agreement end date Jul. 31, 2022      
Asset Purchase Agreement earn-out | $ / shares $ 6.00      
Common Class C [Member] | Wagz [Member]        
Related Party Transaction [Line Items]        
Shares acquired from Asset Purchase Agreement | shares 600,000