| Component: (Network and Table) | |
|---|---|
| Network | 100470 - Disclosure - Accrued Liabilities - Schedule of Accrued Liabilities (Detail) (http://www.ambarella.com/20170131/taxonomy/role/DisclosureAccruedLiabilitiesScheduleOfAccruedLiabilitiesDetail) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001280263 (http://www.sec.gov/CIK) |
| Payables And Accruals [Abstract] | Period [Axis] | |
|---|---|---|
2017-01-31 | 2016-01-31 | |
Payables And Accruals [Abstract] | ||
Accrued employee compensation | ||
Accrued warranty | ||
Accrued rebates | ||
Accrued product development costs | ||
Other accrued liabilities | ||
Total accrued liabilities | 26,448,000 | 23,778,000 |