Amendment: Ekso Bionics Holdings Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Completion of Acquisition or Disposition of Assets, Results of Operations and Financial Condition, Unregistered Sales of Equity Securities, Material Modification to Rights of Security Holders, Changes in Registrant's Certifying Accountant, Changes in Control of Registrant, Leadership Update, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits