Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Assets:
Corporate-owned life insurance — non-current	$ 868	$ 853
Active markets for identical assets or liabilities (Level 1) [Member]
Assets:
Corporate-owned life insurance — non-current	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member]
Assets:
Corporate-owned life insurance — non-current	0	0
Active markets for unobservable inputs (Level 3) [Member]
Assets:
Corporate-owned life insurance — non-current	$ 868	$ 853