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Fair Value Measurements - Recurring Basis (Details) - USD ($)
6 Months Ended
Jun. 30, 2014
Jan. 31, 2017
Nov. 05, 2013
Contingent guaranteed obligation | Cantel Medical (UK)      
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis      
Contingent guaranteed obligation   $ 323,000  
Discount rate of cash flow projections (as a percent)   10.10%  
Level 3 | Recurring basis | Jet Prep Ltd.      
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis      
Assumed contingent obligation   $ 1,138,000 $ 1,720,000
Level 3 | Recurring basis | Cantel Medical (UK)      
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis      
Contingent guaranteed obligation $ 1,414,000 $ 323,000  
Discount rate of cash flow projections (as a percent) 10.10%