Rendering

Component: (Network and Table)
Network
100660 - Disclosure - Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail)
(http://www.ambarella.com/20170131/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfBeginningAndEndingAmountOfUnrecognizedTaxBenefitsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001280263 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-02-01 - 2017-01-31
2015-02-01 - 2016-01-31
2014-02-01 - 2015-01-31
Income Tax Disclosure [Abstract]
 
 
 
Beginning balance
30,211,000  
4,671,000  
3,583,000  
Additions based on tax positions related to the current year
7,830,000  
17,169,000  
1,284,000  
Additions for tax positions of prior years
911,000  
8,810,000  
324,000  
Reductions for tax positions in prior years
0  
(37,000) 
0  
Settlements for prior periods
0  
0  
(43,000) 
Lapse of applicable statute of limitations
(975,000) 
(402,000) 
(477,000) 
Ending balance
37,977,000  
 
30,211,000  
 
4,671,000