Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 159	$ 126
Preferred stock par value	$ 1	$ 1
Preferred stock authorized shares	1,000,000	1,000,000
Preferred stock issued	0	0
Common stock, par value	$ 0.33	$ 0.33
Common stock, authorized shares	12,000,000	12,000,000
Common stock, issued shares	7,170,800	7,170,800
Common stock, outstanding shares	6,602,980	6,602,980
Treasury stock, at cost	567,820	567,820