Note G - Employee Benefit Plans - Fair Values by Asset Category of Defined Benefit Pension Plan (Details) - USD ($)		Jun. 30, 2015
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value by asset category		$ 37,000
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value by asset category		0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value by asset category		0
Cash and Cash Equivalents [Member]
Fair value by asset category		37,000
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value by asset category	[1]	872,000
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value by asset category	[1]	0
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value by asset category	[1]	0
Equity Securities [Member]
Fair value by asset category	[1]	872,000
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value by asset category	[2]	733,000
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value by asset category	[2]	0
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value by asset category	[2]	0
Debt Securities [Member]
Fair value by asset category	[2]	733,000
Fair Value, Inputs, Level 1 [Member]
Fair value by asset category		1,642,000
Fair Value, Inputs, Level 2 [Member]
Fair value by asset category		0
Fair Value, Inputs, Level 3 [Member]
Fair value by asset category		0
Fair value by asset category		$ 1,642,000

[1] This category is comprised of publicly traded funds, of which 76% are large-cap funds, 13% are emerging markets equity funds, and 11% are international equity funds.

[2] This category is comprised of publicly traded funds, of which 32% are short-term fixed income funds, 14% are high-yield fixed income funds, 38% are intermediate fixed income funds, 12% are REITs and MLPs funds, and 4% are international/emerging markets funds.