Statutory Reserve Appropriation for former PRC Subsidiaries (Details)	12 Months Ended
Dec. 31, 2019
Statutory Reserve Appropriation for former PRC Subsidiaries
Statutory Reserve Appropriation for former PRC Subsidiaries	10.00%

It represents the statutory reserve appropriation from its accumulated after-tax profit for Prc Subsidiaries.

No definition available.

Name:	pltyf_StatutoryReserveAppropriationForPrcSubsidiaries
Namespace Prefix:	pltyf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration