Fair Value Of Assets And Liabilities (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Of Assets And Liabilities [Abstract]

Schedule Of Marketable Securities

September 30, 2017	Total		Level 1		Level 2		Level 3
Bond mutual funds	$	8,384,626	$	8,384,626	$	0	$	0
Corporate bonds	$	249,068	$	249,068	$	0	$	0
Certificates of deposit	$	3,061,913	$	0	$	3,061,913	$	0
December 31, 2016	Total		Level 1		Level 2		Level 3
Bond mutual funds	$	7,375,381	$	7,375,381	$	0	$	0
Corporate bonds	$	0	$	0	$	0	$	0
Certificates of deposit	$	3,061,434	$	0	$	3,061,434	$	0

Schedule Of Estimated Fair Value Of Long-Term Obligations Included In Financial Statements

	Carrying Value		Fair Value Level 2
Long-term obligations (including current installments)	$	486,404	$	505,140