Note C - Loans - Age Analysis of the Loan Portfolio, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Past due	$ 10,889	$ 16,802
Current	258,060	256,544
Loans	268,949	273,346
Loans Past Due Greater Than 90 Days and Still Accruing		55
Gaming [Member]
Past due
Current	19,899	25,767
Loans	19,899	25,767
Loans Past Due Greater Than 90 Days and Still Accruing
Hotel/Motel [Member]
Past due
Current	47,294	44,112
Loans	47,294	44,112
Loans Past Due Greater Than 90 Days and Still Accruing
Real Estate, Construction [Member]
Past due	386	3,187
Current	22,823	25,576
Loans	23,209	28,763
Loans Past Due Greater Than 90 Days and Still Accruing
Real Estate, Mortgage [Member]
Past due	10,073	11,725
Current	131,333	128,546
Loans	141,406	140,271
Loans Past Due Greater Than 90 Days and Still Accruing		51
Commercial And Industrial Loan [Member]
Past due	368	1,780
Current	30,258	25,725
Loans	30,626	27,505
Loans Past Due Greater Than 90 Days and Still Accruing		4
Other Loan [Member]
Past due	62	110
Current	6,453	6,818
Loans	6,515	6,928
Loans Past Due Greater Than 90 Days and Still Accruing
Financial Asset, 30 to 59 Days Past Due [Member]
Past due	4,595	4,969
Financial Asset, 30 to 59 Days Past Due [Member] | Gaming [Member]
Past due
Financial Asset, 30 to 59 Days Past Due [Member] | Hotel/Motel [Member]
Past due
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate, Construction [Member]
Past due	303	1,987
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate, Mortgage [Member]
Past due	4,150	2,866
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Industrial Loan [Member]
Past due	92	9
Financial Asset, 30 to 59 Days Past Due [Member] | Other Loan [Member]
Past due	50	107
Financial Asset, 60 to 89 Days Past Due [Member]
Past due	482	7,582
Financial Asset, 60 to 89 Days Past Due [Member] | Gaming [Member]
Past due
Financial Asset, 60 to 89 Days Past Due [Member] | Hotel/Motel [Member]
Past due
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate, Construction [Member]
Past due	69	340
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate, Mortgage [Member]
Past due	343	7,129
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Industrial Loan [Member]
Past due	58	110
Financial Asset, 60 to 89 Days Past Due [Member] | Other Loan [Member]
Past due	12	3
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Past due	5,812	4,251
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Gaming [Member]
Past due
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Hotel/Motel [Member]
Past due
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate, Construction [Member]
Past due	14	860
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate, Mortgage [Member]
Past due	5,580	1,730
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial And Industrial Loan [Member]
Past due	218	1,661
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Loan [Member]
Past due