Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Rental property:
Land	$ 5,163,093	$ 5,163,093
Building and improvements	33,580,785	33,307,858
Machinery and equipment	344,733	343,272
	39,088,611	38,814,223
Less accumulated depreciation	6,751,791	6,281,121
	32,336,820	32,533,102
Land held for development:
Land	558,466	558,466
Land development costs	1,769,680	1,715,846
	2,328,146	2,274,312
Total real estate, net	34,664,966	34,807,414
Cash and cash equivalents	88,528,298	94,164,722
Investment in marketable securities	3,776,530	4,516,472
Rent receivable, net of allowance for doubtful accounts of $79,000 and $67,000, respectively	131,977	142,478
Deferred rent receivable	223,559	225,432
Prepaid expenses and other assets	960,246	662,481
Total Assets	128,285,576	134,518,999
LIABILITIES:
Accounts payable	518,278	486,887
Accrued liabilities	226,426	277,982
Deferred rent liability	83,967	52,351
Tenant security deposits payable	478,113	463,706
Mortgage loans payable		5,013,415
Deferred income taxes	62,964,000	62,964,000
Pension cost liability	668,950	492,656
Total Liabilities	64,939,734	69,750,997
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Common stock, $1 par value; authorized 4,000,000 shares; 1,723,888 shares issued; 1,482,680 shares outstanding	1,723,888	1,723,888
Additional paid-in capital	17,753,505	17,753,505
Accumulated other comprehensive loss	(1,290,449)	(1,195,803)
Balance of undistributed income	46,696,595	48,024,109
	64,883,539	66,305,699
Less cost of shares of common stock held in treasury; 241,208	(1,537,697)	(1,537,697)
Total Stockholders’ Equity	63,345,842	64,768,002
Total Liabilities and Stockholders’ Equity	$ 128,285,576	$ 134,518,999