COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	6 Months Ended
Dec. 31, 2015 USD ($)
Other Commitments [Line Items]
Decrease in cash pledged	$ (543)
Grants received	$ 21,183
Percentage of qualified expenditures eligible for grant	50.00%
Royalty payable based on grants received	100.00%
Accrued and paid royalties	$ 166
Contingent liability amount	$ 21,017
Minimum [Member]
Other Commitments [Line Items]
Royalty rate	3.00%
Maximum [Member]
Other Commitments [Line Items]
Royalty rate	4.00%

Aggregate revenue received from grants as of the balance sheet date.

No definition available.

Name:	psti_AggregateGrantsReceived
Namespace Prefix:	psti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- 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

- 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

- 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

- Definition

The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

Name:	us-gaap_IncreaseDecreaseInRestrictedCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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

- 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

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: