COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Rent expense	$ 548	$ 551
401(k) Plan [Member]
Percentage of matching contributions	25.00%
Percentage of maximum employee contributions	5.00%
Compensation expense	$ 42	$ 54
Forfeited match contributions used to reduce match expense	$ 16

Refers to maximum percentage of employee contribution under plan.

No definition available.

Name:	pdex_DefinedContributionPlanEmployeeContributionPercentageOfEmployeeCompensationMaximum
Namespace Prefix:	pdex_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Forfeited match contributions used to reduce match expense.

+ References

No definition available.

+ Details

Name:	pdex_ForfeitedMatchContributionsUsedToReduceMatchExpense
Namespace Prefix:	pdex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PlanNameAxis=pdex_RetirementSavings401kPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: