Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Consolidated Condensed Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 136	$ 135
Common shares, par value	$ 1.00	$ 1.00
Common shares, shares authorized	20,000,000	20,000,000
Common shares, shares issued	5,986,000	5,981,000
Common shares, shares outstanding	5,986,000	5,981,000