INVESTMENTS

12 Months Ended

Dec. 31, 2015

INVESTMENTS

INVESTMENTS

NOTE B—INVESTMENTS

        The amortized cost, unrealized gains and estimated fair values of the Company's available-for-sale securities held are summarized as follows:

	December 31,
	2015		2014
	(in thousands)
U.S. Treasury Bonds, stripped of interest, maturing 2020 and 2022, aggregate par value of $1.6 million and $1.6 million, respectively:
Amortized cost	$	1,138	$	1,069
Gross unrealized gains		310		353
Estimated fair value	$	1,448	$	1,422

        The unrealized gains for each year results from the disposition of such securities due to the release of the Company's obligation related to securing its commitment under debentures. The basis of the securities sold is determined using the specific identification method.

        The amortized cost and estimated fair values of available-for-sale securities, by contractual maturity at December 31, 2015, are shown below.

	Amortized cost		Estimated fair value
	(in thousands)
Due within one year	$	114	$	145
Due after one year through five years		546		685
Due after five years through ten years		478		618
Total	$	1,138	$	1,448