Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts receivable, allowance for doubtful account	$ 2,337	$ 2,236
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	35,827,677	35,332,677
Common stock, shares outstanding (in shares)	35,827,677	35,332,677