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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Accounts receivable allowance $ 493 $ 335 [1]
Preferred stock, par value (in dollars per share) $ 1 $ 1 [1]
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000 [1]
Preferred stock, shares issued (in shares) 250,000 250,000 [1]
Preferred stock, shares outstanding (in shares) 250,000 250,000 [1]
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) 2,657,530 2,657,530
Common stock, shares outstanding (in shares) 2,657,530 2,657,530
[1] The balance sheet at December 31, 2019 has been derived from the audited financial statements at that date