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SHARE-BASED COMPENSATION (Details Textuals) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated share-based compensation expense $ 3us-gaap_AllocatedShareBasedCompensationExpense $ 10us-gaap_AllocatedShareBasedCompensationExpense $ 14us-gaap_AllocatedShareBasedCompensationExpense $ 42us-gaap_AllocatedShareBasedCompensationExpense  
Unrecognized compensation cost 2us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions   2us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions    
Number of nonvested stock options 5,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares   5,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares    
Weighted average value of non vested stock options (in dollars per share) $ 1.73us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue   $ 1.73us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue    
Unrecognized expensse recognized weighted average period     5 months 9 days    
Employees Stock Option Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares reserved for future issuance 531,381us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_EmployeesStockOptionPlan2004Member
  531,381us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_EmployeesStockOptionPlan2004Member
   
Directors Stock Option Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares reserved for future issuance 173,334us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_DirectorsStockOptionPlan2004Member
  173,334us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_DirectorsStockOptionPlan2004Member
   
ESPP          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares reserved for future issuance 704,715us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_EmployeeStockPurchasePlanMember
  704,715us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= pdex_EmployeeStockPurchasePlanMember
   
Description of plan        

Offering and purchase periods of six months, and bases the pricing to purchase shares of our common stock on a formula so as to result in a per share purchase price that approximates a 15% discount from the market price of a share of our common stock at the end of the purchase period.

Restricted shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 1,333,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
  1,333,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
   
Description of vesting period    

Vesting periods as determined by the Board for the Employee Stock Option Plan and six months for the Directors’ Stock Option Plan, and terms of up to ten years, subject to forfeit 30 days after the holder ceases to be an employee or 90 days after the holder ceases to be a director, as the case may be.

   
Unrecognized compensation cost $ 3us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
  $ 3us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
   
Unrecognized expensse recognized weighted average period     5 months 9 days    
Restricted shares | Employees Stock Option Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 1,066,667us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pdex_EmployeesStockOptionPlan2004Member
  1,066,667us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pdex_EmployeesStockOptionPlan2004Member
   
Forfeiture period of stock option in case of cessation of employment     30 days    
Restricted shares | Directors Stock Option Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 266,666us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pdex_DirectorsStockOptionPlan2004Member
  266,666us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pdex_DirectorsStockOptionPlan2004Member
   
Forfeiture period of stock option in case of cessation of employment     90 days