Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 686	$ 663
Inventory reserves	$ 1,646	$ 1,555
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	12,782,907	12,782,907
Common stock, shares outstanding	12,764,546	12,764,546
Treasury stock, shares	18,361	18,361