CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED BALANCE SHEETS
Trade receivables, allowance for doubtful accounts (in dollars)	$ 167	$ 177
Common stock, no par value (in dollars per share)	$ 0.00	$ 0.00
Common stock, authorized shares	50,000	50,000
Common stock, shares issued	8,845	8,631
Common stock, shares outstanding	8,845	8,631
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, authorized shares	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0