Condensed Consolidated Balance Sheets (Unaudited) Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Allowance for Doubtful Accounts Receivable, Current	$ 1,221	$ 1,719
Current liabilities:
Debt Instrument, Unamortized Discount, Current	64	0
Other Liabilities:
Debt Instrument, Unamortized Discount, Long-Term	$ 128	$ 0
Stockholders' Equity:
Preferred Stock, Par or Stated 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 or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	60,000,000	60,000,000
Common Stock, Shares, Issued	36,495,652	36,418,385
Common Stock, Shares, Outstanding	36,455,143	36,377,876
Treasury Stock, Shares	40,509	40,509