Note N - Condensed Parent Company Only Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash in bank subsidiary	$ 29,424	$ 17,191	$ 25,281	$ 41,116
Other assets	1,280	1,382
Total assets	594,702	616,786
Other liabilities	1,549	1,789
Shareholders' equity	95,123	86,934	89,499
Total liabilities and shareholders' equity	594,702	616,786
Parent Company [Member]
Cash in bank subsidiary	740	283	$ 1,392	$ 191
Other assets	2,664	2,830
Total assets	95,123	86,934
Other liabilities	0	0
Shareholders' equity	95,123	86,934
Total liabilities and shareholders' equity	95,123	86,934
Parent Company [Member] | The Peoples Bank, Biloxi, Mississippi [Member]
Investments in subsidiaries, at underlying equity	91,718	83,820
Parent Company [Member] | PFC Service Corp. [Member]
Investments in subsidiaries, at underlying equity	$ 1	$ 1