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Investments (Tables)

9 Months Ended

Sep. 30, 2018

Investments [Abstract]

Cost And Estimated Fair Value Of Investments

		Cost				Gross unrealized gain				Gross unrealized loss				Fair value
September 30, 2018
Commercial Paper		$	316			$	0			$	0			$	316
Treasury Bills			7,671				33				0				7,704
Equity Securities			54				0				(9	)			45
			8,041				33				(9	)			8,065
Less Cash Equivalents			316				0				0				316
Total Investments, September 30, 2018		$	7,725			$	33			$	(9	)		$	7,749
December 31, 2017
Commercial Paper		$	568			$	0			$	0			$	568
Treasury Bills			7,687				24				0				7,711
Equity Securities			54				0				(9	)			45
			8,309				24				(9	)			8,324
Less Cash Equivalents			568				0				0				568
Total Investments, December 31, 2017		$	7,741			$	24			$	(9	)		$	7,756

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Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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