At 22 years old, the Marlborough-based maker of so-called personal exoskeletons to help people who've lost mobility is finally nearing a long-awaited inflection point: becoming profitable. The company will spend $19 million to acquire AlterG, a Fremont, California-based company behind bionic legs and "anti-gravity" physical rehabilitation systems. Part of the goal in acquiring AlterG is to inherit its salesforce in preparation for a potential Medicare and Medicaid reimbursement later this year.
