Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts on trade accounts receivables	$ 50	$ 50
Property and equipment, net of accumulated depreciation and amortization	2,709	2,852
Intangible assets, net of accumulated amortization	$ 7,793	$ 6,746
Stockholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, share authorized	85,000,000	85,000,000
Common stock, share issued	54,745,430	54,383,747
Common stock, share outstanding	54,677,554	54,315,871
Treasury stock, shares	67,876	67,876