Consolidated Condensed Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Accounts receivable, less allowance for doubtful accounts	$ 7,610	$ 6,748
Stockholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Common Stock
Stockholders' equity:
Common stock, shares authorized	28,200,000	28,200,000
Common stock, shares issued	15,643,049	15,310,426
Common stock, shares outstanding	15,643,049	15,310,426
Common stock, par value	$ 0.01	$ 0.01
Common Stock Class B
Stockholders' equity:
Common stock, shares authorized	3,200,000	3,200,000
Common stock, shares issued	1,162,500	1,162,500
Common stock, shares outstanding	1,162,500	1,162,500