EARNINGS PER SHARE (Narrative) (Details) - shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Statements [Line Items]
Anti-dilutive shares excluded from diluted weighted average number of shares	101,014	563,995

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	pts_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration