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Note 11 - Collateralized Securities Transactions (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]

		Repurchase Agreements
		Remaining Contractual Maturity of the Agreements
Collateral Type:		Overnight and Continuous				Up to 30 days				30 - 90 days				Greater than 90 days				Total
U.S. treasury and government agency MBS (GCF repo)		$	1,946,890			$	1,070,094			$	-			$	-			$	3,016,984
MBS (gestation repo)			638,057				2,004,451				51,530				-				2,694,038
SBA loans			2,190																2,190
		$	2,587,137			$	3,074,545			$	51,530			$	-			$	5,713,212

		Reverse Repurchase Agreements
		Remaining Contractual Maturity of the Agreements
Collateral Type:		Overnight and Continuous				Up to 30 days				30 - 90 days				Greater than 90 days				Total
U.S. treasury and government agency MBS (GCF repo)		$	871,805			$	1,016,446			$	1,091,609			$	39,816			$	3,019,676
MBS (gestation repo)			641,619				2,003,514				51,534				-				2,696,667
		$	1,513,424			$	3,019,960			$	1,143,143			$	39,816			$	5,716,343

		Repurchase Agreements
		Remaining Contractual Maturity of the Agreements
Collateral Type:		Overnight and Continuous				Up to 30 days				30 - 90 days				Greater than 90 days				Total
U.S. treasury and government agency MBS (GCF repo)		$	5,117,811			$	1,546,510			$	-			$	-			$	6,664,321
MBS (gestation repo)			-				742,035				100,403				-				842,438
SBA loans			27,684				-				-				-				27,684
		$	5,145,495			$	2,288,545			$	100,403			$	-			$	7,534,443

		Reverse Repurchase Agreements
		Remaining Contractual Maturity of the Agreements
U.S. treasury and government agency MBS (GCF repo)		$	1,231,027			$	2,525,188			$	2,319,079			$	575,058			$	6,650,352
MBS (gestation repo)			-				747,692				101,958				-				849,650
		$	1,231,027			$	3,272,880			$	2,421,037			$	575,058			$	7,500,002