Stock Options - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period	4 years
Bowman Consulting Group Ltd. Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
New option shares granted	0
Intrinsic value per share of options	$ 6.00	$ 6.43
Cash payments received from exercise of options	$ 18,424
Compensation costs	0
Unrecognized compensation costs	$ 0
Minimum \| Bowman Consulting Group Ltd. Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period	2 years
Maximum \| Bowman Consulting Group Ltd. Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options vesting period	5 years

Share-based compensation arrangement by share based payment award options outstanding intrinsic value per share.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Gross number of share options (or share units) granted during the period.

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