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Organization and Description of Business - Additional Information (Details)
 3 Months Ended 23 Months Ended
Dec. 08, 2022
Apr. 14, 2022
USD ($)
Mar. 31, 2023
USD ($)
Claim
unique_solution
shares
Mar. 31, 2023
USD ($)
Claim
unique_solution
Dec. 31, 2022
USD ($)
Dec. 03, 2022
USD ($)
Jan. 31, 2018
patient
Schedule of Capitalization, Equity [Line Items]              
Reimbursement claims | unique_solution     3,200 3,200      
Revenue not yet recognized     $ 8,900,000 $ 8,900,000      
Number of renal transplant patients (more than) | patient             1,700
Accumulated deficit     484,883,000 484,883,000 $ 460,444,000    
Cash, cash equivalents, and short-term investments     $ 285,900,000 285,900,000      
Stock repurchase program, authorized amount           $ 50,000,000  
Stock repurchase program, period in force 2 years            
Number of common stock purchased (in shares) | shares     59,472        
Stock repurchased value     $ 700,000        
Stock repurchase program, remaining authorized repurchase amount     $ 48,700,000 48,700,000      
Miromatrix, Inc.              
Schedule of Capitalization, Equity [Line Items]              
Payments to acquire minority interest       $ 5,100,000      
At The Market Equity Offering              
Schedule of Capitalization, Equity [Line Items]              
Sale of stock amount maximum   $ 200,000,000          
Sale of stock, commission fee percentage   3.00%          
XynManagement, Inc.              
Schedule of Capitalization, Equity [Line Items]              
Number of unique solutions | unique_solution     2        
Medicare | AlloSure Kidney              
Schedule of Capitalization, Equity [Line Items]              
Reimbursement rate     $ 2,841        
Reimbursement claims | Claim     3,200 3,200      
Medicare | AlloMap Heart              
Schedule of Capitalization, Equity [Line Items]              
Reimbursement rate     $ 3,240        
Medicare | AlloSure Heart              
Schedule of Capitalization, Equity [Line Items]              
Reimbursement rate     $ 2,753