Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Future Maturities of Loans and Capital Leases (Detail)

v2.4.1.9
Debt - Summary of Future Maturities of Loans and Capital Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Line of Credit Facility [Line Items]    
2015 $ 3,907us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear  
2016 7,145us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 5,094us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2018 3,981us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
2019 3,860us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive  
2020 9,630infu_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix  
Total 33,617us-gaap_LongTermDebt 25,484us-gaap_LongTermDebt
Term Loans [Member]    
Line of Credit Facility [Line Items]    
2015 1,930us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2016 3,860us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2017 3,860us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2018 3,860us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2019 3,860us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2020 9,630infu_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
Total 27,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
20,087us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
2016 1,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
 
Total 1,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
566us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
Capital Lease Obligations [Member]    
Line of Credit Facility [Line Items]    
2015 1,977us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
2016 2,285us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
2017 1,234us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
2018 121us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
Total $ 5,617us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
$ 4,831us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember