|
Income Taxes (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
| Current tax expense: | |||
| Provision for current income taxes related to state and foreign taxes | $ (100,000)cpst_CurrentStateAndForeignTaxExpenseBenefit | ||
| Reconciliation of income tax (benefit) expense to the federal statutory rate | |||
| Federal income tax at the statutory rate | (10,681,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (5,452,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (7,436,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
| State taxes, net of federal effect | (671,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (93,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (661,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes |
| Foreign taxes | 33,000us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | 134,000us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | 675,000us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential |
| R&D tax credit | (392,000)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | 37,000us-gaap_IncomeTaxReconciliationTaxCreditsResearch | (1,157,000)us-gaap_IncomeTaxReconciliationTaxCreditsResearch |
| Impact of state rate change | (2,627,000)us-gaap_IncomeTaxReconciliationTaxContingenciesStateAndLocal | 492,000us-gaap_IncomeTaxReconciliationTaxContingenciesStateAndLocal | 838,000us-gaap_IncomeTaxReconciliationTaxContingenciesStateAndLocal |
| Warrant liability | (3,000)cpst_IncomeTaxReconciliationWarrantLiability | (299,000)cpst_IncomeTaxReconciliationWarrantLiability | |
| Expiring NOL | 3,865,000cpst_IncomeTaxReconciliationExpiringNetOperatingLosses | 1,543,000cpst_IncomeTaxReconciliationExpiringNetOperatingLosses | |
| Valuation allowance | 10,583,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 3,614,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (1,877,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance |
| Excess tax benefit - stock compensation | 10,383,000cpst_IncomeTaxReconciliationExcessTaxBenefitNetOperatingLossesStockCompensation | ||
| Other | 7,000us-gaap_IncomeTaxReconciliationOtherReconcilingItems | (52,000)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | 228,000us-gaap_IncomeTaxReconciliationOtherReconcilingItems |
| Income tax expense (benefit) | 117,000us-gaap_IncomeTaxExpenseBenefit | 220,000us-gaap_IncomeTaxExpenseBenefit | 694,000us-gaap_IncomeTaxExpenseBenefit |
| Deferred tax assets: | |||
| Inventories | 3,323,000us-gaap_DeferredTaxAssetsInventory | 2,152,000us-gaap_DeferredTaxAssetsInventory | |
| Warranty reserve | 1,217,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves | 1,051,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves | |
| Bad debt reserve | 4,223,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | 803,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | |
| Deferred revenue | 953,000us-gaap_DeferredTaxAssetsDeferredIncome | 731,000us-gaap_DeferredTaxAssetsDeferredIncome | |
| Net operating loss (NOL) carry forwards | 218,826,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 214,071,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | |
| Tax credit carry forwards | 18,860,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 18,369,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | |
| Depreciation, amortization and impairment loss | 3,231,000us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 3,631,000us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | |
| Other | 5,154,000us-gaap_DeferredTaxAssetsOther | 4,477,000us-gaap_DeferredTaxAssetsOther | |
| Deferred tax assets | 255,787,000us-gaap_DeferredTaxAssetsGross | 245,285,000us-gaap_DeferredTaxAssetsGross | |
| Valuation allowance for deferred tax assets | (246,753,000)us-gaap_DeferredTaxAssetsValuationAllowance | (236,169,000)us-gaap_DeferredTaxAssetsValuationAllowance | |
| Deferred tax assets, net of valuation allowance | 9,034,000us-gaap_DeferredTaxAssetsNet | 9,116,000us-gaap_DeferredTaxAssetsNet | |
| Deferred tax liabilities: | |||
| Federal benefit of state taxes | (9,034,000)cpst_DeferredTaxLiabilitiesFederalBenefitOfStateTaxes | (9,116,000)cpst_DeferredTaxLiabilitiesFederalBenefitOfStateTaxes | |
| Valuation allowance | |||
| Change in valuation allowance | $ 10,600,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | $ 3,600,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | $ 1,900,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
| X | ||||||||||
|
- Definition
Amount of current state and foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the amount of deferred tax liability attributable to taxable temporary differences from federal benefit of state taxes. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to excess tax benefit net operating losses stock compensation. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to expiring net operating losses. No definition available.
|
| X | ||||||||||
|
- Definition
Represents the portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to warrant liability. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
|
| X | ||||||||||
|
- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from loss reserves other than estimated credit losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from warranty reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in state and local income tax contingency. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|