You can use shared service for this case.

For example:

angular.module("yourAppName", []).factory("mySharedService", function(){
    var mySharedService = {};

    mySharedService.values = {};

    mySharedService.setValues = function(params){
        mySharedService.values = params;
    }

      return mySharedService; 

});

And after inject it into any controller.

function OverviewController($scope, mySharedService) {
    $scope.changeProductValue = function(value){
        mySharedService.setValues(value);  
    }
}

function DetailController($scope, mySharedService) {
   $scope.currentDetail = myService.values;
}

You should not forget, that every controller has own $scope.

You can use shared service for case, where you want pass some values from one controller to another.

For example:

angular.module("yourAppName", []).factory("mySharedService", function(){
    var mySharedService = {};

    mySharedService.values = {};

    mySharedService.setValues = function(params){
        mySharedService.values = params;
    }

      return mySharedService; 
});

And after inject it into any controller.

function OverviewController($scope, mySharedService) {
    $scope.changeProductValue = function(value){
        mySharedService.setValues(value);  
    }
}

function DetailController($scope, mySharedService) {
   $scope.currentDetail = myService.values;
}