Note 4 - Common Stock (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

			Shares of
	Shares		Treasury		Shares
	Issued		Stock		Outstanding
January 1, 2018, $.50 par value stock, 200,000 shares authorized		184,735		27,070		157,665
Purchase of stock		---		432		(432	)
December 31, 2018, $.50 par value stock, 200,000 shares authorized		184,735		27,502		157,233
Purchase of stock		---		618		(618	)
December 31, 2019, $.50 par value stock, 200,000 shares authorized		184,735		28,120		156,615