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Summary of Significant Accounting Policies (Details Textual) (USD $)
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Summary of Significant Accounting Policies (Additional Textual) [Abstract]      
Goodwill $ 73,571,000us-gaap_Goodwill $ 72,804,000us-gaap_Goodwill  
Excess amount deposited in excess of limit 117,900,000qsii_AmountDepositedInExcessOfLimitProvidedByBanksAndFinancialInstitutions    
Limit provided by banks and financial institutions for deposition 250,000qsii_LimitProvidedByBanksAndFinancialInstitutionsForDeposition    
Maximum maturities period of cash and cash equivalents 90 days    
Capitalized software costs, net 40,397,000us-gaap_CapitalizedComputerSoftwareNet 39,152,000us-gaap_CapitalizedComputerSoftwareNet  
Self insurance reserve 2,290,000us-gaap_SelfInsuranceReserveCurrent 2,090,000us-gaap_SelfInsuranceReserveCurrent  
Advertising cost 7,079,000us-gaap_AdvertisingExpense 5,600,000us-gaap_AdvertisingExpense 6,499,000us-gaap_AdvertisingExpense
Stock Options [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Options excluded from the computation of diluted net income per share 1,656,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
1,355,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
966,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Minimum [Member]      
Summary of Significant Accounting Policies (Additional Textual) [Abstract]      
Amortization period of intangible assets 6 months    
Maximum [Member]      
Summary of Significant Accounting Policies (Additional Textual) [Abstract]      
Amortization period of intangible assets 10 years    
Computer Equipment [Member] | Minimum [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Useful life 3 years    
Computer Equipment [Member] | Maximum [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Useful life 5 years    
Furniture and Fixtures [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Furniture's and fixtures useful life lesser of lease term lesser of lease term or estimated useful life of asset    
Furniture and Fixtures [Member] | Minimum [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Useful life 5 years    
Furniture and Fixtures [Member] | Maximum [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Useful life 7 years    
Equipment and improvement [Member]      
Summary of Significant Accounting Policies (Textual) [Abstract]      
Estimated useful lives of the assets P3Y    
Hospital Solutions Division [Member]      
Summary of Significant Accounting Policies (Additional Textual) [Abstract]      
Goodwill $ 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= qsii_HospitalSolutionsDivisionMember
$ 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= qsii_HospitalSolutionsDivisionMember