Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Allowance For Doubtful Receivables And Sales Returns	$ 2,992	$ 3,108
Equity:
Preferred Stock, par value per share	$ 0.02	$ 0.02
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value per share	$ 0.375	$ 0.375
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	17,823,292	17,688,350
Common Stock, shares outstanding	17,823,292	17,688,350