Note 5 - Acquisition - PWI Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Dec. 01, 2020
Goodwill, Ending Balance	$ 102,342	$ 121,130
PWI Holdings [Member]
Cash and cash equivalents			$ 90
Restricted cash			21,578
Service fee receivable			1,459
Other receivables			2,748
Income taxes recoverable			60
Property and equipment, net			175
Right-of-use asset			254
Goodwill, Ending Balance	$ 20,200		20,238
Other assets			1,321
Total assets			67,473
Accrued expenses and other liabilities			8,165
Lease liability			255
Net deferred income tax liabilities			4,229
Deferred service fees			30,400
Total liabilities			43,049
Purchase price			24,424
PWI Holdings [Member] | Trade Names [Member]
Intangible asset subject to amortization - trade name			4,550
PWI Holdings [Member] | Customer Relationships [Member]
Intangible asset subject to amortization - customer relationships			$ 15,000