CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Receivables, allowance for doubtful accounts	$ 436	$ 570
Shareholders' equity:
Common stock, no par value	$ 0	$ 0
Common stock, stated value	$ 0.1	$ 0.1
Common stock, authorized	100,000,000	100,000,000
Common stock, issued	13,396,176	13,298,626
Common stock, outstanding	13,396,176	13,298,626