Interim Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 7,408	$ 5,743
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	45,000,000	30,000,000
Common stock,shares, issued (in shares)	15,195,030	15,162,938
Common stock, shares outstanding (in shares)	15,195,030	15,162,938