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Restructuring Charges (Details Textual) (USD $)
 3 Months Ended 9 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Apr. 30, 2014
Restructuring Charges (Textual) [Abstract]          
Restructuring charges $ 221,000us-gaap_RestructuringCharges $ 38,000us-gaap_RestructuringCharges $ 1,322,000us-gaap_RestructuringCharges $ 1,130,000us-gaap_RestructuringCharges  
Workforce Reduction [Member]          
Restructuring Charges (Textual) [Abstract]          
Restructuring charges     1,101,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember		    
Other Operational Expense [Member]          
Restructuring Charges (Textual) [Abstract]          
Restructuring charges     95,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_OtherExpenseMember		    
April 2014 Restructuring Program [Member] | Workforce Reduction [Member]          
Restructuring Charges (Textual) [Abstract]          
Anticipated reduction in expenses         4,600,000us-gaap_EffectOnFutureEarningsAmount
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= amcc_April2014RestructuringProgramMember
April 2014 Restructuring Program [Member] | Other Operational Expense [Member]          
Restructuring Charges (Textual) [Abstract]          
Anticipated reduction in expenses         $ 600,000us-gaap_EffectOnFutureEarningsAmount
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_OtherExpenseMember
/ us-gaap_RestructuringPlanAxis
= amcc_April2014RestructuringProgramMember