Note 4. Investments

The cost and estimated fair value of the Company’s investments are as follows:



			Gross		Gross
			unrealized		unrealized		Fair
	Cost		gain		loss		value
June 30, 2015
Money Market	$	1,979	$	0	$	0	$	1,979
Commercial Paper		171		0		0		171
Treasury Bills		6,141		1		0		6,142
Equity Securities		54		0		(54)		0
		8,345		1		(54)		8,292
Less Cash Equivalents		2,150		0		0		2,150
Total Investments, June 30, 2015	$	6,195	$	1	$	(54)	$	6,142


December 31, 2014
Money Market	$	510	$	0	$	0	$	510
Commercial Paper		345		0		0		345
Treasury Bills		6,542		0		0		6,542
Equity Securities		72		1,238		(54)		1,256
		7,469		1,238		(54)		8,653
Less Cash Equivalents		855		0		0		855
Total Investments, December 31, 2014	$	6,614	$	1,238	$	(54)	$	7,798

At December 31, 2014, the Company’s significant investment in equity securities was 122,649 shares of Rudolph Technologies, Inc. (“Rudolph”), accounted for under the available-for-sale method. As of December 31, 2014, the aggregate value of the Company’s Rudolph shares as reported on the Nasdaq Stock Exchange (ticker symbol RTEC) was approximately $1,254, with an approximate cost of $16. During the three-month periods ended June 30, 2015 and 2014, the Company sold 49,066 and 18,240 shares, respectively, of Rudolph stock and realized gains of $632 and $203, respectively, in non-operating income. During the six-month periods ended June 30, 2015 and 2014, the Company sold 122,649 and 67,419 shares, respectively, of Rudolph stock and realized gains of $1,447 and $750, respectively, in non-operating income. As of June 30, 2015, the Company owned no shares of Rudolph stock.