Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 38	$ 0
Fair value of equity-method investment	$ 33,177	$ 24,355
Par Value (in dollars per share)	$ 0.001	$ 0.001
Shares Authorized (in shares)	18,000,000	18,000,000
Shares Issued (in shares)	14,397,000	14,220,000
Shares Outstanding (in shares)	11,352,000	11,406,000
Treasury stock (in shares)	3,045,000	2,814,000