CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED BALANCE SHEETS
Trade receivables, allowance for doubtful accounts (in dollars)	$ 284	$ 226
Common stock, authorized shares	50,000	50,000
Common stock, shares issued	8,466	8,110
Common stock, shares outstanding	8,466	8,110
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