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ORGANIZATION AND DESCRIPTION OF BUSINESS (Details)
 3 Months Ended 6 Months Ended 23 Months Ended
May 09, 2023
USD ($)
Apr. 01, 2023
USD ($)
Dec. 08, 2022
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2024
USD ($)
solution
shares
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
May 23, 2024
shares
Dec. 31, 2023
USD ($)
Dec. 03, 2022
USD ($)
Jan. 31, 2018
patient
Schedule of Capitalization, Equity [Line Items]                      
Payments to acquire minority interest         $ 0 $ 100,000          
Number of renal transplant patients (more than) | patient                     1,900
Accumulated deficit       $ 696,844,000 696,844,000       $ 678,269,000    
Cash, cash equivalents, and short-term investments       228,900,000 228,900,000            
Debt outstanding       $ 0 $ 0            
Shares reserved for future issuance of common stock (in shares) | shares               250,000,000      
Stock repurchase program, authorized amount                   $ 50,000,000  
Stock repurchase program, period in force (in years)     2 years                
Number of common stock purchased (in shares) | shares       0 55,500            
Stock repurchased value         $ 500,000            
Stock repurchase program, remaining authorized repurchase amount       $ 21,400,000 $ 21,400,000            
Miromatrix, Inc.                      
Schedule of Capitalization, Equity [Line Items]                      
Payments to acquire minority interest             $ 5,100,000        
XynManagement, Inc.                      
Schedule of Capitalization, Equity [Line Items]                      
Number of unique solutions | solution         2            
AlloSure Kidney                      
Schedule of Capitalization, Equity [Line Items]                      
Reimbursement rate         $ 2,841            
AlloMap Heart                      
Schedule of Capitalization, Equity [Line Items]                      
Reimbursement rate         3,240            
AlloSure Heart                      
Schedule of Capitalization, Equity [Line Items]                      
Reimbursement rate         $ 2,753            
AlloSure lung Testing Services                      
Schedule of Capitalization, Equity [Line Items]                      
Reimbursement rate $ 2,753                    
HeartCare                      
Schedule of Capitalization, Equity [Line Items]                      
Reimbursement rate   $ 5,993