Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 890	$ 940
Preferred stock, no par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares outstanding	0	0
Common stock, no par value
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	6,933,116	6,933,029
Common stock, shares outstanding	6,933,116	6,933,029