Leases - Details of Right-of-Use Assets and Lease Liabilities (Details) - USD ($)	Sep. 29, 2019	Mar. 31, 2019
Right-of-use assets:
Operating leases	$ 1,920,000
Finance leases	250,000
Total	2,170,000	$ 975,000
Lease liabilities:
Operating leases	1,944,000
Finance leases	141,000
Total	$ 2,085,000	$ 939,000