jQuery Grid v 15.1.20151.1005

I'm binding the JSON results of an AJAX query to the grid as follows:

    $.ajax({
        type : 'GET',
        url : env_constants.DATASERVICES_URL + '/ar_invoices',
        data : params,
        dataType : 'json',
        success : function(invoiceRows) {
            $("#ar_invoices").igGrid("option", "dataSource", invoiceRows);
            $("#ar_invoices").igGrid( "resizeContainer" );
        },
        error : function(jqXHR, textStatus, errorThrown) {
            alert(jqXHR.responseText);
        }
    });

When I examine the first object of invoiceRows in the browser's debugger I see this field: { invoiceDate : "2015-07-25" }

However, the grid displays this date as "07/24/2015". Similarly, the date 8/1/2015 is displayed as "7/31/2015".

Could the grid be parsing this date format wrong? Perhaps applying a timezone adjustment to it?

Thanks,

Matt