Who is Levi Salem Musa Marhabi the Yemeni Jew held hostage by the Houthis

Who is Levi Salem Musa Marhabi, the Yemeni Jew held hostage by the Houthis? Marhabi was arrested in March 2016 for helping a Jewish family and an 800-year-old Torah leave Yemen. In March 2018, he was sentenced to three and a half years in prison.