Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Allowance for Doubtful Accounts Receivable	$ 5,801	$ 4,265
Treasury stock (in shares)	1,409,634	0
Series A Redeemable Convertible Preferred Stock [Member]
Preferred stock par value (in dollars per share)	$ 0.001	$ 0.001
Authorized shares, preferred	10,000,000	10,000,000
Issued shares, preferred	0	0
Outstanding shares, preferred	0	0
Common Stock [Member]
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Authorized shares, common	300,000,000	300,000,000
Issued shares, common	59,162,325	58,434,464
Outstanding shares, common	57,752,961	58,434,464