Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 525	$ 910
Common stock, par value	$ 0.04	$ 0.04
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	69,678,982	69,598,982
Common stock, shares outstanding	69,669,587	69,589,587
Treasury stock, number of shares	9,395	9,395