11. Commitments (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Lease Expiration Date	Jul. 31, 2016
Description of Lessee Leasing Arrangements, Operating Leases	The lease is for a five year period, beginning August 1, 2011, with a five year option in a one-story facility. In June 2016, the Company extended the lease term for another five years until August 2022.
Lessee, Operating Lease, Term of Contract	5 years
Operating Leases, Rent Expense	$ 353,000	$ 365,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 23,047	$ 22,223