Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $)	Mar. 31, 2014	Mar. 31, 2013
Income Taxes [Abstract]
Vacation accrual	$ 137,052	$ 134,214
Inventory reserve	107,173	103,540
Depreciation	(37,131)	(4,756)
Stock-based compensation deductions	120,009	145,592
Unrealized gain on marketable securities	(500,904)	(888,836)
Other	56,588	69,510
Net deferred tax liabilities	(117,213)	(440,736)
Deferred tax assets	237,387	0
Deferred taxes	0	(440,736)
Long-term deferred tax liabilities	$ (354,600)	$ 0