Summary of Significant Accounting Policies (Detail Textuals)	12 Months Ended
	Mar. 31, 2017 USD ($) Tenant Supplier	Mar. 31, 2016 USD ($) Supplier	Mar. 31, 2015 USD ($)	Dec. 22, 2015 USD ($) ft² a Building
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts (in dollars) | $	$ 27,000	$ 13,000
Inventory reserve | $	$ 51,000	64,000
Depreciation method	straight-line method
Purchase price of Property purchased | $				$ 18,500,000
Area of land | ft²				634,000
Area of building complex | a				14.6
Number of Units in Real Estate Property | Building				2
Percentage of property on lease	48.00%
Number of tenants | Tenant	2
Remaining weighted average lease term	3 years
Unrealized gain (loss) on short term investments | $		$ 54,000	$ (17,000)
Year to date
Significant Accounting Policies [Line Items]
Amount of excess tax benefit | $	$ 156,000
Building
Significant Accounting Policies [Line Items]
Estimated useful lives of assets	thirty years
Area of building complex | ft²				185,000
Furniture, fixtures and equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of assets	three to seven years
Computer software
Significant Accounting Policies [Line Items]
Estimated useful lives of assets	three to seven years
Building One
Significant Accounting Policies [Line Items]
Area of building complex | ft²				125,000
Area occupied | ft²				97,000
Building Two
Significant Accounting Policies [Line Items]
Area of building complex | ft²				60,000
Supplier concentration risk | Cost of goods
Significant Accounting Policies [Line Items]
Number of suppliers | Supplier	4	4
Percentage products purchased from suppliers	50.00%	50.00%