Interest-Bearing Time Deposits (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Interest-Bearing Time Deposits
Due in one year or less	$ 1,250	$ 1,050
Due after one year through five years	600	1,250
Interest-bearing time deposits	$ 1,850	$ 2,300

Amount of time deposit liabilities, maturing after one year through five years from the balance sheet date.

No definition available.

Name:	wmpn_ContractualMaturitiesTimeDepositsOneYearThroughFiveYears
Namespace Prefix:	wmpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant