Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Condensed Consolidated Balance Sheets
Accounts receivable, allowances (in dollars)	$ 821	$ 774
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	53,012,876	52,770,722
Common stock, shares outstanding	53,012,876	52,770,722