Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts receivable, allowance for doubtful accounts	$ 1,768	$ 1,791
Property and equipment, accumulated depreciation	3,772	3,264
Other intangibles, accumulated amortization	$ 8,708	$ 8,684
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)	6,472,038	6,472,038
Treasury stock, shares (in shares)	1,292,620	1,264,154