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ACQUISITION AND RELATED PARTY ITEMS - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 05, 2019
Feb. 22, 2019
Dec. 21, 2018
Dec. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Business Acquisition [Line Items]              
Goodwill, period increase (decrease)         $ 68,000    
Acquisition related costs             $ 100,000
Cuattro, LLC | Heska Imaging | Affiliated Entity              
Business Acquisition [Line Items]              
Related party - amount of transaction         0 $ 0  
Heska Imaging | Affiliated Entity              
Business Acquisition [Line Items]              
Due to related parties         $ 0    
Cuattro, LLC              
Business Acquisition [Line Items]              
Equity transferred as consideration for asset acquisition (in shares)     54,763        
Equity transferred as consideration for asset acquisition, value     $ 5,400,000        
Payments for asset acquisitions     $ 2,800,000        
CVM              
Business Acquisition [Line Items]              
Purchase price $ 14,420,000            
Equity interest issued and issuable $ 8,900,000            
Revenue of acquiree since acquisition date       $ 800,000      
Net income of acquiree since acquisition date       $ 100,000      
Percentage of voting interest acquired 100.00%            
Optomed              
Business Acquisition [Line Items]              
Percentage of voting interest acquired   70.00%          
Cash consideration transferred   $ 200,000          
Debt assumed as consideration for business combination   400,000          
Real Estate Purchase | Optomed              
Business Acquisition [Line Items]              
Committed purchase amount   $ 1,200,000          
Optomed | Optomed              
Business Acquisition [Line Items]              
Minority interest   30.00%