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Concentration of Credit Risk	9 Months Ended
Concentration of Credit Risk	Dec. 31, 2017
Risks And Uncertainties [Abstract]
Concentration of Credit Risk	12. Concentration of Credit Risk We had cash deposits at United States banks and financial institutions which exceeded federally insured limits at December 31, 2017. We are exposed to credit loss for amounts in excess of insured limits in the event of non-performance by the institutions; however, we do not anticipate non-performance by these institutions.