Investments (Tables)

6 Months Ended

Nov. 30, 2012

Investments [Abstract]

Summary of investments

The following is a summary of investments:

	Gross  Amortized Costs		Gross  Unrealized Gains		Fair Value
	(Dollars in thousands)
November 30, 2012
U. S. Treasury Bills	$	13,998	$	2	$	14,000
May 31, 2012
U. S. Treasury Bills	$	16,998	$	5	$	17,003