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2410406 - Disclosure - INCOME TAXES - Summary of Activity Related to Uncertain Tax Benefit (Detail)
(http://kitepharma.com/role/IncomeTaxesSummaryOfActivityRelatedToUncertainTaxBenefitDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001510580 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Net unrecognized tax benefits as of December 31
10,392,000  
0  
0  
Gross increases - tax positions in prior periods
1,379,000  
0  
0  
Gross decreases - tax positions in prior periods
(2,143,000) 
0  
0  
Gross increases - tax positions in current periods
9,628,000  
10,392,000  
0  
Gross decreases - tax positions in current periods
0  
0  
0  
Net unrecognized tax benefits as of December 31
19,256,000  
 
10,392,000  
 
0