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Pension Plan (Details) - USD ($)
1 Months Ended
May 14, 2019
Mar. 31, 2019
Mar. 31, 2018
Pension Plan (Details) [Line Items]      
Liability, Defined Benefit Pension Plan, Current   $ 709,000 $ 669,000
Liability, Defined Benefit Pension Plan, Noncurrent   3,600,000 $ 3,500,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year   $ 623,000  
Subsequent Event [Member]      
Pension Plan (Details) [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 391,000