Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Allowance For Doubtful Receivables And Sales Returns	$ 3.2	$ 3.6
Equity:
Common Stock, par value per share	$ 0.375	$ 0.375
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	18,434,815	18,336,010
Common Stock, shares outstanding	18,434,815	18,336,010