Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Trade and other accounts receivable, allowance	$ 170	$ 143
Common stock, par value	$ 0.10	$ 0.1000
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	31,738,000	29,846,000
Common stock, shares outstanding	31,738,000	29,846,000