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
September 30, 2015
Money Market	$	1,984	$	0	$	0	$	1,984
Commercial Paper		271		0		0		271
Treasury Bills		6,137		4		0		6,141
Equity Securities		54		0		(54)		0
		8,446		4		(54)		8,396
Less Cash Equivalents		2,255		0		0		2,255
Total Investments, September 30, 2015	$	6,191	$	4	$	(54)	$	6,141


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 period ended September 30, 2014, the Company sold 25,700 shares of Rudolph stock and realized gains of $258 in non-operating income. During the nine-month periods ended September 30, 2015 and 2014, the Company sold 122,649 and 93,119 shares, respectively, of Rudolph stock and realized gains of $1,447 and $1,008, respectively, in non-operating income. As of September 30, 2015, the Company owned no shares of Rudolph stock.