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Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2019
Mar. 31, 2019
Statement Of Financial Position [Abstract]    
Common Stock, Par or Stated Value Per Share
Common Stock, Shares Authorized 100,000 100,000
Common Stock, Shares, Issued 91,500 91,500
Common Stock, Shares, Outstanding 91,500 91,500