private function get_course_id() {

		global $post;
		$post_id = isset( $post->ID ) ? $post->ID : null;

		$course_id = null;

		if ( $post_id ) {

			if ( 'course' !== $post->post_type ) {

				// get the parent
				$parent = llms_get_post_parent_course( $post );
				if ( $parent ) {
					$course_id = $parent->get( 'id' );
				}
			} else {

				$course_id = $post_id;

			}
		}

		return $course_id;

	}