Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 205	$ 153
Common stock, par value (in dollars per share)	$ 0.04	$ 0.04
Common stock, shares authorized (in shares)	240,000,000	240,000,000
Common stock, shares issued (in shares)	70,887,448	70,382,544
Common stock, shares outstanding (in shares)	70,878,053	70,373,149
Treasury stock (in shares)	9,395	9,395