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Defined Contribution Plans (Details) - 401 (K) Plan [Member] - USD ($) | 12 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Minimum age required to participate in defined contribution plan | 21 years |  |
Minimum service period required to participate in defined contribution plan | 6 months |  |
Employer's matching contribution | 50.00% |  |
Employer's maximum contribution specified as percentage of employee compensation | 6.00% |  |
Matching contributions vesting period | 5 years |  |
Matching contribution, amount | $ 389,000 | $ 353,000 | $ 347,000

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- Definition The vesting period of employer's matching contribution over the period. + References No definition available. + Details
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- Definition The minimum age of employees who are eligible to cover under defined contribution plan service. + References No definition available. + Details
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- Definition The minimum service period of employees who are eligible to cover under defined contribution plan service. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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