| Document and Entity Information | Jul. 21, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | Jul. 21, 2021 |
| Entity Registrant Name | Berkshire Grey, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39768 |
| Entity Tax Identification Number | 85-2994421 |
| Entity Address, Address Line One | 140 South Road |
| Entity Address, City or Town | Bedford |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01730 |
| City Area Code | 833 |
| Local Phone Number | 848-9900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Amendment Description | This Amendment No. 1 on Form 8-K/A (this “Amendment No. 1”) amends the Current Report on Form 8-K of Berkshire Grey, Inc., a Delaware corporation (the “Company”), filed on July 27, 2021 (the “Original Report”), in which the Company reported, among other events, the completion of the Business Combination (as defined in the Original Report).This Amendment No. 1 (i) includes the unaudited financial statements of Legacy Berkshire Grey (as defined in the Original Report) as of and for the six months ended June 30, 2021 and 2020, and (ii) includes the Management’s Discussion and Analysis of Financial Condition and Results of Operations of Legacy Berkshire Grey for the six months ended June 30, 2021.This Amendment No. 1 also includes the unaudited pro forma condensed combined financial information of RAAC (as defined in the Original Report) and Legacy Berkshire Grey as of and for the six months ended June 30, 2021. |
| Entity Central Index Key | 0001824734 |
| Amendment Flag | true |
| Class A common stock, par value of $0.0001 per share [Member] | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Class A common stock, par value of $0.0001 per share |
| Trading Symbol | BGRY |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share [Member] | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | BGRYW |
| Security Exchange Name | NASDAQ |
