Employee Stock Purchase and Stock Incentive Plans - Additional Information (Details) - USD ($)		3 Months Ended
	Apr. 30, 2021	Mar. 31, 2026
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares vested (in shares)		1,160,411
Number of unvested stock awards vesting start date		Apr. 01, 2026
Number of unvested stock awards vesting end date		Dec. 31, 2030
Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period (in years)		5 years
Number of shares granted (in shares)		214,072
Number of shares vested (in shares)		142,906
Performance Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted (in shares)		49,771
Number of shares vested (in shares)		64,808
Two Thousand Twenty One Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock purchase (in percent)	15.00%
Period prior to last day of offering period (in days)	30 days
Bowman Consulting Group Ltd. 2021 Omnibus Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
New option shares granted (in shares)		0
Total Outstanding (in shares)		0
Unrecognized compensation costs		$ 0
Common stock authorized and reserved for issuance (in shares)		6,612,079
Common stock reserve automatically increases (in percent)		5.00%
Bowman Consulting Group Ltd. 2021 Omnibus Equity Incentive Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period (in years)		2 years
Bowman Consulting Group Ltd. 2021 Omnibus Equity Incentive Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period (in years)		5 years
Bowman Consulting Group Ltd. Stock Bonus Plan | Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted (in shares)		0
2021 Executive Officers Long Term Incentive Plan | Performance Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted (in shares)		49,771
2021 Executive Officers Long Term Incentive Plan | Minimum | Performance Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period (in years)		2 years 10 months 28 days
2021 Executive Officers Long Term Incentive Plan | Maximum | Performance Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period (in years)		4 years