Investments

3 Months Ended

Aug. 31, 2011

Investments [Abstract]

Investments

NOTE 2 Investments

The following is a summary of investments (dollars in thousands):

			Gross
	Gross		Unrealized
	Amortized		(Losses)		Fair
	Costs		Gains		Value
August 31, 2011
U. S. Treasury Bills	$	30,995	$	5	$	31,000
May 31, 2011
U. S. Treasury Bills	$	34,994	$	11	$	35,005

The fair value is determined by a secondary market for U.S. Government Securities. At August 31, 2011 and May 31, 2011, the U.S. Treasury Bills mature within eight and five months, respectively.