Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Details)

v2.4.1.9
Intangible Assets (Details) (USD $)
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Intangible Assets      
Intangible Assets, Gross $ 8,196,000us-gaap_FiniteLivedIntangibleAssetsGross $ 8,196,000us-gaap_FiniteLivedIntangibleAssetsGross  
Accumulated Amortization 6,859,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization 6,406,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Total expected future amortization 1,337,000us-gaap_IntangibleAssetsNetExcludingGoodwill 1,790,000us-gaap_IntangibleAssetsNetExcludingGoodwill  
Amortization expense 500,000us-gaap_AmortizationOfIntangibleAssets 500,000us-gaap_AmortizationOfIntangibleAssets 500,000us-gaap_AmortizationOfIntangibleAssets
Expected future amortization expense of intangible assets      
2016 332,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
2017 352,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2018 242,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2019 224,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2020 187,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Total expected future amortization 1,337,000us-gaap_IntangibleAssetsNetExcludingGoodwill 1,790,000us-gaap_IntangibleAssetsNetExcludingGoodwill  
Manufacturing license      
Intangible Assets      
Weighted Average Amortization Period 17 years 17 years  
Intangible Assets, Gross 3,700,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
3,700,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
 
Accumulated Amortization 3,585,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
3,536,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
 
Total expected future amortization 115,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
164,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
 
Expected future amortization expense of intangible assets      
Total expected future amortization 115,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
164,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
 
Technology      
Intangible Assets      
Weighted Average Amortization Period 10 years 10 years  
Intangible Assets, Gross 2,240,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
2,240,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
 
Accumulated Amortization 1,157,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
933,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
 
Total expected future amortization 1,083,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
1,307,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
 
Expected future amortization expense of intangible assets      
Total expected future amortization 1,083,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
1,307,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TechnologyMember
 
Parts and service customer relationships      
Intangible Assets      
Weighted Average Amortization Period 5 years 5 years  
Intangible Assets, Gross 1,080,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
1,080,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
 
Accumulated Amortization 1,080,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
900,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
 
Total expected future amortization   180,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
 
Expected future amortization expense of intangible assets      
Total expected future amortization   180,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_PartsAndServiceCustomerRelationshipsMember
 
TA100 customer relationships      
Intangible Assets      
Weighted Average Amortization Period 2 years 2 years  
Intangible Assets, Gross 617,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TA100CustomerRelationshipsMember
617,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TA100CustomerRelationshipsMember
 
Accumulated Amortization 617,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TA100CustomerRelationshipsMember
617,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cpst_TA100CustomerRelationshipsMember
 
Backlog      
Intangible Assets      
Intangible Assets, Gross 490,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
490,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
 
Accumulated Amortization 351,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
351,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
 
Total expected future amortization 139,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
139,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
 
Expected future amortization expense of intangible assets      
Total expected future amortization 139,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
139,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
 
Trade name      
Intangible Assets      
Weighted Average Amortization Period 1 year 2 months 12 days 1 year 2 months 12 days  
Intangible Assets, Gross 69,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
69,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Accumulated Amortization $ 69,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
$ 69,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember