Summary of Significant Accounting Policies (Detail Textuals) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts (in dollars)	$ 8,000	$ 7,000
Short term investments - available for sale	15,591,000	15,539,000
Inventory reserve	63,000	90,000
Unrealized (loss) on short term investments	$ (17,000)	$ (35,000)	$ (46,000)
Depreciation method	Straight-line method
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
Business Concentrations | Cost of goods
Significant Accounting Policies [Line Items]
Number of suppliers	4	5
Percentage products purchased from suppliers	50.00%	50.00%