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Commitments and Contingencies - (Details) - Aquadex Product Line [Member] - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended
Aug. 31, 2016
Jun. 30, 2018
Contingent Consideration [Abstract]    
Sale or disposal of business assets threshold for contingent consideration $ 4,000  
Percentage of additional payments on disposes of business assets 40.00%  
Maximum [Member]    
Contingent Consideration [Abstract]    
Contingent consideration period   3 years