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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2018
Mar. 31, 2018
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.0277 $ 0.0277
Common stock, shares authorized 115,000,000 115,000,000
Common stock, shares issued 56,188,000  
Shares subject to stock restriction agreements 3,006,000