XML 30 R30.htm IDEA: XBRL DOCUMENT v2.4.1.9
Certain Financial Statement Information Short-Term Investments (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost $ 79,735us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 103,548us-gaap_AvailableForSaleSecuritiesAmortizedCost    
Available-for-sale Securities, Gross Unrealized Gain 3,505us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains 3,455us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains    
Available-for-sale Securities, Gross Unrealized Loss (217)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss (420)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss    
Available-for-sale Securities, Estimated Fair Value 83,023us-gaap_AvailableForSaleSecurities 106,583us-gaap_AvailableForSaleSecurities    
Cash and cash equivalents 50,080us-gaap_CashAndCashEquivalentsAtCarryingValue 71,539us-gaap_CashAndCashEquivalentsAtCarryingValue 23,630us-gaap_CashAndCashEquivalentsAtCarryingValue 19,065us-gaap_CashAndCashEquivalentsAtCarryingValue
Short-term investments available-for-sale 32,943us-gaap_AvailableForSaleSecuritiesCurrent 35,044us-gaap_AvailableForSaleSecuritiesCurrent    
Cash, Cash equivalents and Short-term investments, Estimated Fair Value 83,023amcc_CashCashEquivalentsAndShortTermInvestmentsEstimatedFairValue 106,583amcc_CashCashEquivalentsAndShortTermInvestmentsEstimatedFairValue    
Cash [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Cash and Cash equivalents, Estimated Fair Value 40,828us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CashMember
65,867us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CashMember
   
Cash equivalents [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Cash and Cash equivalents, Estimated Fair Value 9,252us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CashEquivalentsMember
5,672us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CashEquivalentsMember
   
U.S Treasury securities and agency bonds [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost 1,475us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
2,838us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
   
Available-for-sale Securities, Gross Unrealized Gain 0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
   
Available-for-sale Securities, Gross Unrealized Loss 0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
   
Available-for-sale Securities, Estimated Fair Value 1,475us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
2,838us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_USTreasurySecuritiesAndAgencyBondsMember
   
Corporate bonds [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost 10,911us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
10,599us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
   
Available-for-sale Securities, Gross Unrealized Gain 14us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
30us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
   
Available-for-sale Securities, Gross Unrealized Loss (9)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
(2)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
   
Available-for-sale Securities, Estimated Fair Value 10,916us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
10,627us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AllOtherCorporateBondsMember
   
Mortgage-backed and asset-backed securities [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost 1,614us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
1,793us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
   
Available-for-sale Securities, Gross Unrealized Gain 291us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
297us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
   
Available-for-sale Securities, Gross Unrealized Loss (2)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
(16)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
   
Available-for-sale Securities, Estimated Fair Value 1,903us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
[1] 2,074us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_MortgageBackedAndAssetBackedSecuritiesMember
[1]    
Closed-end bond funds [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost 13,249us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
14,373us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
   
Available-for-sale Securities, Gross Unrealized Gain 2,248us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
2,392us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
   
Available-for-sale Securities, Gross Unrealized Loss (206)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
(402)us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
   
Available-for-sale Securities, Estimated Fair Value 15,291us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
16,363us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= amcc_ClosedEndBondFundsMember
   
Preferred stock [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Available-for-sale Securities, Amortized Cost 2,406us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
2,406us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
   
Available-for-sale Securities, Gross Unrealized Gain 952us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
736us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
   
Available-for-sale Securities, Gross Unrealized Loss 0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
   
Available-for-sale Securities, Estimated Fair Value 3,358us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
3,142us-gaap_AvailableForSaleSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
   
Mortgage-backed securities [Member]        
Schedule of cash, cash equivalents and available-for-sale investments by type of instruments        
Cash, Cash equivalents and Short-term investments, Estimated Fair Value $ 1,000amcc_CashCashEquivalentsAndShortTermInvestmentsEstimatedFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
[1] $ 1,100amcc_CashCashEquivalentsAndShortTermInvestmentsEstimatedFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
[1]    
[1] At December 31, 2014 and March 31, 2014, approximately $1.0 million and $1.1 million of the estimated fair value presented were mortgage-backed securities, respectively.