Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 154	$ 223
Common shares, par value	$ 1.00	$ 1.00
Common shares, shares authorized	20,000,000	20,000,000
Common shares, shares issued	5,687,000	5,646,000
Common shares, shares outstanding	5,687,000	5,646,000