WordPress MU

Im trying to add the time to my home.php as to when a blog get's updated. The code I have so far is:

<?php
$blogs = get_last_updated();
if( is_array( $blogs ) ) {
	?>
	<h3>Recently Updated Blogs</h3>
		<ul>
	<?php foreach( $blogs as $details ) {
		?><li><a href="http://<?php echo $details[ 'domain' ] . $details[ 'path' ] ?>"><?php echo get_blog_option( $details[ 'blog_id' ], 'blogname' ) ?><?php echo " - ";?></li> <?php
	}
	?>
	</ul>
	<?php
}

Im trying to get the updated time to display after the echo " - " can someone help me out?