Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Consolidated Condensed Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 135	$ 120
Common shares, par value	$ 1.00	$ 1.00
Common shares, shares authorized	20,000,000	20,000,000
Common shares, shares issued	5,981,000	5,844,000
Common shares, shares outstanding	5,981,000	5,844,000