Stock-Based Compensation - Stock Option Grants Valuation (Details)	12 Months Ended
Mar. 31, 2018
Minimum \| Stock Options
Assumptions:
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	100.00%

Purchase price of common stock expressed as a percentage of its fair value.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration