| Document And Entity Information - USD ($) $ in Millions | 12 Months Ended | ||
| Dec. 31, 2021 | Feb. 28, 2022 | Jun. 30, 2021 | |
| Document Information Line Items | |||
| Entity Registrant Name | Grid Dynamics Holdings, Inc. | ||
| Trading Symbol | GDYN | ||
| Document Type | 10-K/A | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Common Stock, Shares Outstanding | 66,954,362 | ||
| Entity Public Float | $ 448.9 | ||
| Amendment Flag | true | ||
| Amendment Description | On March 3, 2022, Grid Dynamics Holdings, Inc. (“Grid Dynamics,” the “Company,” “we,” “us,” or “our”) filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2021 (the “Original Filing”) with the Securities and Exchange Commission (the “SEC”). This Annual Report on Form 10-K/A (the “Amendment”) is being filed as Amendment No. 1 to the Original Filing for the purposes of including information that was to be incorporated by reference from our definitive proxy statement pursuant to Regulation 14A of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”).In addition, pursuant to the rules of the SEC, we have also included as exhibits currently dated certifications required under Section 302 of The Sarbanes-Oxley Act of 2002. Because no financial statements are contained within this Amendment, we are not including certifications pursuant to Section 906 of The Sarbanes-Oxley Act of 2002. We are amending and refiling Part IV to reflect the inclusion of those certifications.Except as described above, no other changes have been made to the Original Filing. Except as otherwise indicated herein, this Amendment continues to speak as of the date of the Original Filing, and we have not updated the disclosures contained therein to reflect any events that occurred subsequent to the date of the Original Filing. The filing of this Amendment is not a representation that any statements contained in items of the Original Filing other than Part III, Items 10 through 14, are true or complete as of any date subsequent to the Original Filing.Business CombinationOn March 5, 2020, a wholly-owned subsidiary (“Merger Sub 1”) of ChaSerg Technology Acquisition Corp., a Delaware corporation (“ChaSerg”), merged with and into Grid Dynamics International, Inc., a California corporation (“GDI”), with GDI surviving the merger (the “Initial Merger”). Immediately following the Initial Merger, GDI merged with and into another wholly-owned subsidiary of ChaSerg (“Merger Sub 2”) with Merger Sub 2 surviving; Merger Sub 2 was then renamed “Grid Dynamics International, LLC” and ChaSerg was then renamed “Grid Dynamics Holdings, Inc.” (the “Business Combination”). As of the open of trading on March 6, 2020, the common stock and warrants of Grid Dynamics Holdings, Inc., formerly those of ChaSerg, began trading on the Nasdaq Stock Market LLC as “GDYN” and “GDYNW”, respectively. | ||
| Entity Central Index Key | 0001743725 | ||
| Entity Current Reporting Status | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Well-known Seasoned Issuer | No | ||
| Document Period End Date | Dec. 31, 2021 | ||
| Document Fiscal Year Focus | 2021 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | true | ||
| Entity Shell Company | false | ||
| Entity Ex Transition Period | false | ||
| ICFR Auditor Attestation Flag | false | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Entity File Number | 001-38685 | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 83-0632724 | ||
| Entity Address, Address Line One | 5000 Executive Parkway | ||
| Entity Address, Address Line Two | Suite 520 | ||
| Entity Address, City or Town | San Ramon | ||
| Entity Address, Country | CA | ||
| Entity Address, Postal Zip Code | 94583 | ||
| City Area Code | (650) | ||
| Local Phone Number | 523-5000 | ||
| Title of 12(b) Security | Common Stock, par value $0.0001 per share | ||
| Security Exchange Name | NASDAQ | ||
| Entity Interactive Data Current | Yes | ||
| Auditor Name | GRANT THORNTON LLP | ||
| Auditor Location | San Francisco, California | ||
| Auditor Firm ID | 248 |
