Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

v2.4.1.9
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
In Thousands, except Share data, unless otherwise specified
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Treasury Stock
Total
Balance at Mar. 31, 2012 $ 300us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 790,901us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (731,412)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ (1,172)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ 58,617us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2012 300,315,313us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    997,820us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock       (40)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(40)us-gaap_TreasuryStockValueAcquiredCostMethod
Purchase of treasury stock (in shares)       40,883us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Vested restricted stock awards (in shares) 469,911us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock-based compensation   1,500us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    1,500us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Exercise of stock options and employee stock purchases 1cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
20cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    21cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
Exercise of stock options and employee stock purchases (in shares) 22,478cpst_StockIssuedDuringPeriodSharesStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock awards to Board of Directors   101cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    101cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
Stock awards to Board of Directors (in shares) 103,574cpst_StockIssuedDuringPeriodSharesStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock upon exercise of put option 5us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
4,245us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    4,250us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Issuance of common stock upon exercise of put option (in shares) 4,750,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Net loss     (22,563)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (22,563)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Balance at Mar. 31, 2013 306us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
796,767us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(753,975)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(1,212)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
41,886us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2013 305,661,276us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    1,038,703us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock       (118)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(118)us-gaap_TreasuryStockValueAcquiredCostMethod
Purchase of treasury stock (in shares)       104,571us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Vested restricted stock awards (in shares) 407,845us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock-based compensation   2,031us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    2,031us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Exercise of stock options and employee stock purchases 1cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
479cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    480cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
Exercise of stock options and employee stock purchases (in shares) 357,619cpst_StockIssuedDuringPeriodSharesStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock awards to Board of Directors   116cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    116cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
Stock awards to Board of Directors (in shares) 368,827cpst_StockIssuedDuringPeriodSharesStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Warrants exercised 5cpst_StockIssuedDuringPeriodValueStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
5,949cpst_StockIssuedDuringPeriodValueStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    5,954cpst_StockIssuedDuringPeriodValueStockWarrantsExercised
Warrants exercised (in shares) 4,725,000cpst_StockIssuedDuringPeriodSharesStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Net loss     (16,256)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (16,256)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Balance at Mar. 31, 2014 312us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
805,342us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(770,231)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(1,330)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
34,093us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2014 311,520,567us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    1,143,274us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock       (184)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(184)us-gaap_TreasuryStockValueAcquiredCostMethod
Purchase of treasury stock (in shares)       112,604us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
 
Vested restricted stock awards (in shares) 582,528us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock-based compensation   2,119us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    2,119us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Exercise of stock options and employee stock purchases 1cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
319cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    320cpst_StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
Exercise of stock options and employee stock purchases (in shares) 342,860cpst_StockIssuedDuringPeriodSharesStockOptionsExercisedAndEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock awards to Board of Directors   117cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    117cpst_StockIssuedDuringPeriodValueStockAwardToBoardOfDirectors
Stock awards to Board of Directors (in shares) 364,885cpst_StockIssuedDuringPeriodSharesStockAwardToBoardOfDirectors
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock, net of issuance costs 19us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
29,753us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    29,772us-gaap_StockIssuedDuringPeriodValueNewIssues
Issuance of common stock, net of issuance costs (in shares) 18,825,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Net loss     (31,533)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (31,533)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Balance at Mar. 31, 2015 $ 332us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 837,650us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (801,764)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ (1,514)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ 34,704us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2015 331,635,840us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
    1,255,878us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember