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STOCKHOLDERS' EQUITY (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 1 Months Ended | 6 Months Ended | 1 Months Ended
--- | --- | --- | ---
Oct. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2014
Class of Stock [Line Items] |  |  |
Issuance of common stock in a private placement, shares | 200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |
Issuance of common stock in a private placement | $ 528 us-gaap_StockIssuedDuringPeriodValueNewIssues |  |
Stock based compensation to contractor |  |  |
Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Issuance of common stock in a private placement, shares |  | 200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
Stock based compensation to contractor, shares |  | 100,004 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 100,004 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock based compensation to contractor |  |  | 250 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Investor Warrants [Member] |  |  |
Class of Stock [Line Items] |  |  |
Warrants exercised via cashless exercise |  | 1,449,010 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ClassOfWarrantOrRightAxis = psti_InvestorWarrantsMember |
Warrants exercised via cashless exercise, shares issued |  | 675,067 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_ClassOfWarrantOrRightAxis = psti_InvestorWarrantsMember |
Warrants exercised for cash |  | 147,667 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_ClassOfWarrantOrRightAxis = psti_InvestorWarrantsMember |
Number of warrants exercised |  | 147,667 psti_SharebasedCompensationArrangementWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = psti_InvestorWarrantsMember |
Aggregate cash consideration received |  | $ 244 us-gaap_ProceedsFromWarrantExercises / us-gaap_ClassOfWarrantOrRightAxis = psti_InvestorWarrantsMember |

X
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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