Consolidated Balance Sheets (Parenthetical) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Consolidated Balance Sheets [Abstract]
Allowance for Bad Debts Reserve and Sales Returns	$ 282	$ 564
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares, Issued	4,842,294	4,753,654
Common Stock, Shares, Outstanding	4,520,376	4,431,736
Treasury Stock, Shares	321,918	321,918