Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 709	$ 716
Fixed assets, accumulated depreciation and amortization	$ 16,415	$ 14,009
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	2,000,000,000	2,000,000,000
Common Stock, shares issued	39,628,000	39,439,000
Treasury Stock, shares at cost	3,281,000	2,440,000