Note 17 - Accounts Payable and Other Liabilities - Accounts Payable and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts payable	$ 162	$ 362
Redeemable financial instruments accrued interest	316	403
Accrued income tax	99
Accrued interest payable	630	711
Accrued interest on securities sold, not yet purchased	435	914
Payroll taxes payable	1,048	729
Counterparty cash collateral	41,119	9,524	$ 4,277	$ 1,219
Accrued expense and other liabilities	2,442	7,652
Accounts payable and other liabilities	$ 46,251	$ 20,295