Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Allowance for doubtful accounts, net	$ 50	$ 49
Stockholders equity:
Preferred stock, par value	$ 1	$ 1
Preferred stock, authorized shares	1,000,000	1,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.60	$ 0.60
Common stock, authorized shares	20,000,000	20,000,000
Common stock, issued shares	13,754,749	13,730,562
Common stock, outstanding shares	13,754,749	13,730,562
Treasury stock, shares	30,422	30,422