Annual report pursuant to Section 13 and 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
Dec. 31, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]    
2015 $ 6,452us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear  
2016 18,264us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 768us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
Total 25,484us-gaap_LongTermDebt 26,727us-gaap_LongTermDebt
Term Loans [Member]    
Line of Credit Facility [Line Items]    
2015 4,238us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
2016 15,849us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
 
Total 20,087us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
23,995us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
2016 566us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
 
Total 566us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
 
Capital Lease Obligations [Member]    
Line of Credit Facility [Line Items]    
2015 2,214us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
2016 1,849us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
2017 768us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
 
Total $ 4,831us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
$ 2,732us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember