Warrants (Details 1) (Warrant [Member], USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Warrant [Member]
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Outstanding at December 31 |
1,659,922us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
1,179,956us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Warrants, Granted |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
536,875us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Warrant, Change in Estimate |
0ipwr_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsChangeInEstimate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
244,364ipwr_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsChangeInEstimate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Warrants, Exercised |
(95,814)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
(301,273)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Warrants, Forfeited/Expired |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Outstanding at December 31 |
1,564,108us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
1,659,922us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Outstanding at December 31 (in dollars per share) |
$ 4.3552us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 3.5367us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Granted (in dollars per share) |
$ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 5.6927us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Change in Estimate |
$ 0ipwr_SharebasedCompensationArrangementsBySharebasedPaymentAwardOptionsChangeInEstimateWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 0.0010ipwr_SharebasedCompensationArrangementsBySharebasedPaymentAwardOptionsChangeInEstimateWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Exercised (in dollars per share) |
$ 2.2725us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 0.0010us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Forfeited/Expired (in dollars per share) |
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Weighted Average Exercise Price, Outstanding at December 31 (in dollars per share) |
$ 4.4828us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
$ 4.3552us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
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- Definition
Change in estimate for number of share options (or share units) during the period. No definition available.
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- Definition
Change in estimate of weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Details
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X | ||||||||||
- Definition
For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price of options that were either forfeited or expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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X | ||||||||||
- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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