Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 162,000	$ 149,000
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	4,000,000	4,000,000
Common stock, shares issued	1,879,319	1,871,999
Common stock, shares outstanding	1,687,319	1,679,999
Treasury stock, shares	192,000	192,000