How to add checkbox values to an array in AngularJS?

Someone help me please! Lets say I have an a list of a checkboxes, each checkbox have an ID. I would like to $scope an array with checked checkboxes IDs.

<div ng-app="myapp">
<div ng-controller="ctrlParent">
    <table>           
    <tr ng-repeat="(key, value) in providers">
        <td><input type="checkbox" ng-model="ids[value.Id]">  {{value}} </td>
    </tr>            
    </table>
    {{ids}}
</div>

And my controller:

var app = angular.module('myapp',[]);

app.controller('ctrlParent',function($scope){
    $scope.providers = [{Id:5},{Id:6},{Id:8},{Id:10}];
    $scope.ids = {};
});

Now my array output (if all check boxes are checked) is: {"5":true,"6":true,"8":true,"10":true}

And I would like: [{Id:5},{Id:6},{Id:8},{Id:10}]

Thanx in advance!