Condensed Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 6,687	$ 6,414
Accounts receivable, net of allowance for doubtful accounts of $160 in 2015 and 2014, respectively	4,761	5,007
Materials and supplies	1,057	1,067
Prepaid expenses and other current assets	294	634
Deferred income taxes	399	399
Total Current Assets	13,198	13,521
Property and Equipment, net	85,530	85,955
Land Held for Development	12,457	12,457
Total Assets	111,185	111,933
Current Liabilities:
Accounts payable	4,062	3,872
Current portion of deferred grant and other revenue	424	230
Accrued expenses	2,165	1,810
Total Current Liabilities	6,651	5,912
Deferred Income Taxes	13,176	13,623
Deferred Grant and Other Income	12,877	12,986
Shareholders' Equity:
Preferred stock, 10% noncumulative, $50 par value; authorized, issued and outstanding 640 shares in 2015 and 2014	32	32
Common stock, $.50 par value; authorized 15,000,000 shares; issued and outstanding 4,860,635 shares in 2015 and 4,859,871 shares in 2014	2,430	2,430
Additional paid-in capital	38,001	37,891
Retained earnings	38,018	39,059
Total Shareholders' Equity	78,481	79,412
Total Liabilities and Shareholders' Equity	$ 111,185	$ 111,933