Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 22, 2019
Jun. 30, 2018
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Registrant Name Tricida, Inc.    
Entity Central Index Key 0001595585    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
Entity Small Business false    
Entity Common Stock, Shares Outstanding   42,386,192  
Entity Shell Company false    
Entity Voluntary Filers No    
Entity Well Known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Public Float     $ 0