Summary Of Significant Accounting Policies (Product Warranties) (Details) - USD ($)	9 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Product Warranties Disclosures [Abstract]
Balance at beginning of year	$ 244,310	$ 184,920	$ 184,920
Addition - Charged to costs and expenses	79,100	74,883	102,247
Deductions	(33,700)	(28,431)	(42,857)
Balance at end of year	$ 289,710	$ 231,372	$ 244,310