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FAIR VALUE MEASUREMENT (Narrative) (Details) (Embedded Derivative [Member])
0 Months Ended
Apr. 16, 2013
Embedded Derivative [Member]
 
Fair value assumptions:  
Credit spread 28.50%nspr_FairValueAssumptionsCreditSpread
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Recovery rate 49.80%nspr_FairValueAssumptionsRecoveryRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Probability of default 10.00%us-gaap_FairValueInputsProbabilityOfDefault
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember