Summary of Significant Accounting Policies, Inventory (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Inventory [Abstract]
Prior period over which allocations of labor and variable and fixed overhead costs are determined based on average actual use of production facilities	12 months
Reserve for excess and obsolete inventory	$ 4,125,000	$ 3,626,000
Period of normal operating cycle	1 year
Maximum [Member]
Inventory [Abstract]
Percentage of inventory reserve to cost if no liquidation market exists for part	100.00%