Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Allowance for doubtful accounts	$ 1,157	$ 1,719
Unamortized debt discount, current	13	0
Unamortized debt discount, noncurrent	$ 78	$ 0
Stockholders' Equity:
Preferred stock, par value (per share)	$ 0.1	$ 0.1
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)	$ 0.1	$ 0.1
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,131,777	36,418,385
Common stock, shares outstanding	37,091,268	36,377,876
Treasury stock, shares	40,509	40,509