Annual report pursuant to Section 13 and 15(d)

Debt - Summary of Company's Current and Long-Term Debt (Including Capital Leases) (Detail)

v2.4.1.9
Debt - Summary of Company's Current and Long-Term Debt (Including Capital Leases) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]    
Current portion of long-term debt $ 6,452us-gaap_LongTermDebtCurrent $ 5,118us-gaap_LongTermDebtCurrent
Long-Term Debt 19,032us-gaap_LongTermDebtNoncurrent 21,609us-gaap_LongTermDebtNoncurrent
Total 25,484us-gaap_LongTermDebt 26,727us-gaap_LongTermDebt
Term Loans [Member]    
Line of Credit Facility [Line Items]    
Current portion of long-term debt 4,238us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
4,064us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
Long-Term Debt 15,849us-gaap_LongTermDebtNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= infu_TermLoansMember
19,931us-gaap_LongTermDebtNoncurrent
/ 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]    
Long-Term Debt 566us-gaap_LongTermDebtNoncurrent
/ 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]    
Current portion of long-term debt 2,214us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
1,054us-gaap_LongTermDebtCurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
Long-Term Debt 2,617us-gaap_LongTermDebtNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
1,678us-gaap_LongTermDebtNoncurrent
/ 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