Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Accounts receivable, allowance	$ 31,537	$ 34,805
Land, buildings and equipment, accumulated depreciation	$ 17,964,208	$ 19,006,314
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,097,050	4,053,660
Common stock, shares outstanding	4,097,050	4,053,660