Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts receivable, allowances	$ 4	$ 110
Common Stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued (in shares)	11,649,360	11,680,395
Common stock, shares outstanding (in shares)	11,649,360	11,680,395