Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 745	$ 775
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	6,947,299	6,969,772
Common stock, shares outstanding	6,947,299	6,969,772