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Stock-based compensation (Non vested) (Details) - $ / shares
12 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jul. 01, 2017
Shares      
Beginning balance 1,455,234    
Granted 301,148    
Vested (238,409)    
Forfeited (826,500)    
Ending balance 691,473 1,455,234  
Weighted Average Grant-Date Fair Value      
Beginning balance $ 11.05    
Granted 10.74 $ 8.33 $ 9.46
Vested 10.23    
Forfeited 12.05    
Ending balance $ 10.00 $ 11.05