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COMMITMENTS AND CONTINGENCIES (Other) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jun. 30, 2014
Other Commitments [Line Items] |
Grants received | $ 14,125
Percentage of qualified expenditures eligible for grant | 50.00%
Royalty payable based on grants received | 100.00%
Accrued and paid royalties | 53
Contingent liability amount | $ 14,072
Minimum [Member] |
Other Commitments [Line Items] |
Royalty rate | 3.00%
Maximum [Member] |
Other Commitments [Line Items] |
Royalty rate | 4.00%

X
- Definition Aggregate revenue received from grants as of the balance sheet date. + References No definition available. + Details
Name: | psti_AggregateGrantsReceived
Namespace Prefix: | psti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage Of Qualified Expenditures. + References No definition available. + Details
Name: | psti_PercentageOfQualifiedExpenditures
Namespace Prefix: | psti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of royalty paid or accrued. + References No definition available. + Details
Name: | psti_RoyaltiesAmountPaidAndAccrued
Namespace Prefix: | psti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum royalty payable based on a percentage of grants received. + References No definition available. + Details
Name: | psti_RoyaltyRatePayableOnGrantsReceived
Namespace Prefix: | psti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Royalty rate payable calculated as a percentage of the sale of products and other related revenues generated from such projects. + References No definition available. + Details
Name: | psti_RoyaltyRateSales
Namespace Prefix: | psti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount the entity has committed to make for future royalty guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 440 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013 + Details
Name: | us-gaap_RoyaltyGuaranteesCommitmentsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant