Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Allowance for doubtful accounts	$ 1,195	$ 1,719
Current Liabilities:
Unamortized debt discount, current	49	0
Unamortized debt discount, noncurrent	$ 68	$ 0
Stockholders' Equity:
Preferred stock, par value (per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (per share)	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,431,635	36,418,385
Common stock, shares outstanding	37,391,126	36,377,876
Treasury stock, shares	40,509	40,509