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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)
12 Months Ended
Mar. 31, 2018
ASC 606  
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201409Member
ASC 842  
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201801Member