Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Trade and other accounts receivable, allowance for doubtful accounts	$ 252	$ 143
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	31,782,000	29,846,000
Common stock, shares outstanding	31,782,000	29,846,000