Stock-based Compensation - Summary Of Restricted Stock Option Activity (Detail) - 2017 Amended Equity Incentive Plan [Member] - Restricted stock units [Member] - Bird Rides [Member] - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Number of Shares, Beginning Balance | 804,294 | 1,242,999 | |
| Number of Shares, Vested | (438,705) | (438,705) | |
| Number of Shares, Ending Balance | 365,589 | 804,294 | |
| Number of Shares, Vested at December 31, 2020 | 1,433,847 | ||
| Aggregate intrinsic value, Outstanding | $ 768 | $ 2,558 | $ 6,165 |
| Aggregate intrinsic value, Vested at December 31, 2020 | $ 3,011 | ||
| Weighted Average Grant Date Fair Value, Beginning Balance | $ 0.19 | $ 0.19 | |
| Weighted Average Grant Date Fair Value, Vested | 0.19 | 0.19 | |
| Weighted Average Grant Date Fair Value, Ending Balance | 0.19 | $ 0.19 | |
| Weighted Average Grant Date Fair Value, Vested at December 31, 2020 | $ 0.19 | ||