Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounts receivable allowance	$ 297	$ 328
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred Stock, Shares Authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	250,000	250,000
Preferred stock, shares outstanding (in shares)	250,000	250,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	9,000,000	9,000,000
Common stock, shares issued (in shares)	2,683,513	2,672,064
Common stock, shares outstanding (in shares)	2,683,513	2,672,064