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v2.4.1.9

GENERAL (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Dec. 31, 2013 | Aug. 31, 2011 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014 | Jun. 30, 2014
GENERAL [Abstract] |  |  |  |  |  |  |  |
Accumulated deficit | $ (133,216)us-gaap_RetainedEarningsAccumulatedDeficit |  |  | $ (133,216)us-gaap_RetainedEarningsAccumulatedDeficit |  | $ (133,216)us-gaap_RetainedEarningsAccumulatedDeficit |  | $ (113,834)us-gaap_RetainedEarningsAccumulatedDeficit
Net loss |  |  |  | (7,226)us-gaap_NetIncomeLoss | (9,276)us-gaap_NetIncomeLoss | (19,382)us-gaap_NetIncomeLoss | (20,736)us-gaap_NetIncomeLoss |
Upfront payment received |  |  | 7,000 us-gaap_LicensesRevenue |  |  |  |  |
Nonrefundable payments received |  |  | 5,000 us-gaap_RevenueFromGrants |  |  |  |  |
Advance payment on the development |  |  | 2,000 us-gaap_ProceedsFromCustomers |  |  |  |  |
Milestone revenue receivable |  |  |  |  |  | 37,500 psti_ResearchAndDevelopmentMilestoneRevenueReceivable |  |
Reimbursement revenue receivable |  |  |  |  |  | 10,000 us-gaap_ReimbursementRevenue |  |
Issuance of common stock under CHA agreement |  | 2,500,000 us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets |  |  |  |  |  |
CHA shares classified as marketable securities |  | 1,011,504 psti_AvailableForSaleMarketableSecuritiesNumber |  |  |  |  |  |
Total consideration reflected under the CHA agreement |  | 10,414 us-gaap_StockIssuedDuringPeriodValuePurchaseOfAssets |  |  |  |  | 10,414 us-gaap_StockIssuedDuringPeriodValuePurchaseOfAssets |
Net proceeds from sale of portion of the CHA shares | 5,717 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities |  |  |  |  | 9,879 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 3,875 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities |
Net gain from sale of portion of the CHA shares | 282 us-gaap_MarketableSecuritiesRealizedGainLoss |  |  |  |  | (290)us-gaap_MarketableSecuritiesRealizedGainLoss | (108)us-gaap_MarketableSecuritiesRealizedGainLoss |
Fair value of the remaining investment in CHA shares | $ 5,543 us-gaap_AvailableForSaleSecuritiesCurrent |  |  | $ 5,543 us-gaap_AvailableForSaleSecuritiesCurrent |  | $ 5,543 us-gaap_AvailableForSaleSecuritiesCurrent |  |

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