Business Combination - Additional Information (Details) $ / shares in Units, $ in Thousands	Feb. 04, 2022 USD ($) $ / shares shares	Mar. 31, 2022 $ / shares shares	Feb. 03, 2022 shares	Dec. 31, 2021 $ / shares shares
Business Acquisition [Line Items]
Common stock, shares authorized		350,000,000		350,000,000
Common stock, par value | $ / shares		$ 0.0001		$ 0.0001
Preferred stock, shares authorized		1,000,000
Preferred stock, par value | $ / shares		$ 0.0001
Warrants outstanding	15,516,639	15,516,639	15,516,667
ENNV [Member]
Business Acquisition [Line Items]
Common stock convertible, right to receive shares	2.056
Share authorized	351,000,000
Common stock, shares authorized	350,000,000
Common stock, par value | $ / shares	$ 0.0001
Preferred stock, shares authorized	1,000,000
Preferred stock, par value | $ / shares	$ 0.0001
Exercise price | $ / shares	$ 2.3
Merger Earn Out Shares to be issued in future	10,000,000
Net increase in cash and cash equivalents | $	$ 73
ENNV [Member] | Legacy Fast Radius Warrants
Business Acquisition [Line Items]
Conversion of warrants to shares common stock	2,200,000
ENNV [Member] | Legacy Fast Radius Convertible Notes
Business Acquisition [Line Items]
Conversion of convertible notes to shares of common stock	2,000,000.0
ENNV [Member] | PIPE Shares
Business Acquisition [Line Items]
Share issued in acquisition	7,500,000
Aggregate purchase price of shares | $	$ 75,000
Share issued in acquisition per share | $ / shares	$ 10.00
ENNV [Member] | Public Warrants
Business Acquisition [Line Items]
Warrants outstanding	8,624,972
ENNV [Member] | Private Warrants
Business Acquisition [Line Items]
Warrants outstanding	6,891,667
ENNV [Member] | Tranche One
Business Acquisition [Line Items]
Merger Earn Out Shares to be issued in future	5,000,000
Sponsor Earn Out Shares issued	407,000
Sponsor Earn Out Shares hurdle price	15.00
ENNV [Member] | Tranche Two
Business Acquisition [Line Items]
Merger Earn Out Shares to be issued in future	5,000,000
Sponsor Earn Out Shares issued	407,000
Sponsor Earn Out Shares hurdle price	20.00
Restricted Stock Unit | ENNV [Member]
Business Acquisition [Line Items]
Exercise price | $ / shares	$ 2.3
Merger Earn Out Shares | ENNV [Member] | Tranche One
Business Acquisition [Line Items]
Share issued in acquisition per share | $ / shares	15.00
Merger Earn Out Shares | ENNV [Member] | Tranche Two
Business Acquisition [Line Items]
Share issued in acquisition per share | $ / shares	$ 20.00
Sponsor Earn Out Shares | ENNV [Member]
Business Acquisition [Line Items]
Percentage of shares of common stock held by Sponsor	10.00%