Annual report pursuant to Section 13 and 15(d)

Inventories (Details 2)

v2.4.1.9
Inventories (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Mar. 31, 2014
Non-current Inventory Balance $ 2,258us-gaap_InventoryNoncurrent $ 2,938us-gaap_InventoryNoncurrent
Forecast    
Non-current inventory, 13 to 24 Months 1,544cpst_InventoryNoncurrentPortionToBeConvertedWithinThirteenToTwentyFourMonths
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
 
Non-current inventory, 25 to 36 Months 557cpst_InventoryNoncurrentPortionToBeConvertedWithinTwentyFiveToThirtySixMonths
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
 
Non-current inventory, 37 to 48 Months $ 157cpst_InventoryNoncurrentPortionToBeConvertedWithinThirtySevenToFortyEightMonths
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember