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Related party transactions (Details)
1 Months Ended 12 Months Ended
Apr. 01, 2022
USD ($)
Systems
Jul. 01, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Oct. 27, 2021
USD ($)
Dec. 31, 2019
USD ($)
Feb. 13, 2018
Related Party Transaction Disclosures [Abstract]                
Contract liabilities       $ 341,000 $ 69,000   $ 128,000  
Related party accounts payable       127,000        
Proceeds from related party deposits       175,000 23,000      
A. Michael Stolarski [Member]                
Related Party Transaction Disclosures [Abstract]                
Revenue from related party       32,000 45,000      
Contract liabilities       38,000 $ 70,000      
Deposits for future purchase of medical equipment       $ 125,000        
A. Michael Stolarski [Member] | April 2022 Advances from Directors [Member] | Subsequent Event [Member]                
Related Party Transaction Disclosures [Abstract]                
Advances from related parties $ 250,000              
A. Michael Stolarski [Member] | October 2021 Advances from Directors [Member]                
Related Party Transaction Disclosures [Abstract]                
Advances from related parties           $ 25,000    
Proceeds from related party deposits     $ 125,000          
Principal amount           $ 150,000    
Maturity date       Jun. 30, 2022        
Interest rate           15.00%    
A. Michael Stolarski [Member] | UltraMIST Devices [Member] | April 2022 Advances from Directors [Member] | Subsequent Event [Member]                
Related Party Transaction Disclosures [Abstract]                
Number of systems used as collateral | Systems 18              
Repurchase of collateral amount $ 256,000              
PSWC [Member]                
Related Party Transaction Disclosures [Abstract]                
Purchase price multiplier in reference to EBITDA               5.5
Purchase from related party   $ 127,000            
Monthly rent of equipment   $ 3,600