Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance for credit losses	$ 12,215	$ 72,456
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	125,000,000	125,000,000
Common stock, shares issued (in shares)	42,029,882	41,307,617
Common stock, shares outstanding (in shares)	42,029,882	41,307,617
Trade Accounts Receivable [Member]
Allowance for credit losses	$ 2,288	$ 1,948