Stock-based compensation - Narrative (Details)			1 Months Ended		12 Months Ended
	Mar. 11, 2021 shares	Oct. 12, 2020 USD ($) shares	Jun. 30, 2021 shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2022 USD ($) plan $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Oct. 22, 2021 shares
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of equity incentive plans | plan					4
Number of shares underlying outstanding options, options granted (in shares)						645,796	37,663,242
Employee stock purchase plan, maximum per employee during a purchase right period | $					$ 7,500
Proceeds from ESPP purchase | $					378,000	$ 0	$ 0
Promissory notes | $					39,574,000
Options granted, weighted average grant date fair value (in dollars per share) | $ / shares						$ 5.90	$ 1.10
Options assumed, weighted average grant date fair value (in dollars per share) | $ / shares						$ 3.11
Unamortized stock-based compensation expense of option | $					13,600,000
Proceeds from exercise of stock options and purchase of shares | $					$ 800,000	$ 500,000	$ 1,300,000
Management and Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Promissory notes, percentage forgiven				50.00%
Certain Executives
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Proceeds from noteholders debt | $				$ 500,000
Promissory Note | Notes Payable, Other Payables | Management and Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Promissory notes | $		$ 1,100,000
Interest rate		0.38%
2021 Incentive Award Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares reserved for issuance (in shares)	18,558,576
Increase in number of shares authorized, annual increase percentage	5.00%
2015 Stock Plan | Management and Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Vested options, exercised in period (in shares)		2,883,672
Unvested options, exercised in period (in shares)		4,603,833
2015 Stock Plan | Certain Executives
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation cost upon forgiveness of promissory notes | $						$ 500,000
2022 Employee Stock Purchase Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares reserved for issuance (in shares)					6,600,000
Employee stock purchase plan, maximum employee subscription rate					15.00%
Employee stock purchase plan, offering period					24 months
Employee stock purchase plan, purchase price of common stock, percent					85.00%
Issuance of common stock to employees under employee stock purchase plan (in shares)					300,000
Shares issued (in dollars per share) | $ / shares					$ 1.1730
Proceeds from ESPP purchase | $					$ 400,000
Stock Options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unamortized stock-based compensation expense, period for recognition					1 year 8 months 12 days
Stock Options | Sense Photonics Inc.
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation arrangement, number of shares assumed in business combination								823,114
Stock Options | 2021 Incentive Award Plan | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage					25.00%
Stock Options | 2021 Incentive Award Plan | Share-based Payment Arrangement, Monthly Vesting for Thirty Six Month
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage	2.78%
Stock Options | 2021 Incentive Award Plan | One Senior Advisor
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period				5 years
Number of shares underlying outstanding options, options granted (in shares)				1,614,492
Common stock price to option exercise price, threshold percentage				130.00%
Threshold number of consecutive trading days				30 days
Number of shares forfeited (in shares)			1,614,492
Stock Options | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Stock Options | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Two
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Stock Options | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Three
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Stock Options | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Four
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Stock Options | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Five
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Stock Options | 2015 Stock Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Minimum exercise price as percentage of fair value of shares on grant date					100.00%
Award vesting period					4 years
Stock Options | 2015 Stock Plan | A Shareholder with 10% Ownership
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Option expiration period					5 years
Minimum exercise price as percentage of fair value of shares on grant date					110.00%
Shareholder ownership percentage					10.00%
Stock Options | 2015 Stock Plan | Maximum
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Option expiration period					10 years
Restricted Stock Award | 2021 Incentive Award Plan | Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period					4 years
Restricted Stock Award | 2015 Stock Plan | Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting rights, vested percentage					100.00%
Restricted Stock Award | 2015 Stock Plan | Employee | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage					25.00%
Restricted Stock Units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period					2 years 8 months 12 days
Stock granted in period, other than options (in shares)					15,710,791	5,899,954
RSU, cost not yet recognized | $					$ 61,900,000
Restricted Stock Units | Sense Photonics Inc.
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation arrangement, number of shares assumed in business combination								4,490,980
Restricted Stock Units | 2021 Incentive Award Plan | Employee
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period					4 years
Award vesting rights, vested percentage					100.00%
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period				5 years
Stock granted in period, other than options (in shares)				807,246
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Two
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Three
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Four
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Restricted Stock Units | 2021 Incentive Award Plan | One Senior Advisor | Share-based Payment Arrangement, Tranche Five
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage				20.00%
Restricted Stock Units | 2021 Incentive Award Plan | Several Members of the Board of Directors
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock granted in period, other than options (in shares)				152,628
Restricted Stock Units | 2015 Stock Plan | Employee | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting schedule in percentage					25.00%
Performance Stock Units | 2021 Incentive Award Plan | One Senior Advisor
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period				4 years
Stock granted in period, other than options (in shares)				807,246
Percentage of performance stock units				25.00%
Number of common stock received upon vesting of each performance stock unit (in shares)				1
Performance Stock Units | 2021 Incentive Award Plan | Minimum | One Senior Advisor
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Performance stock, stock price increase percentage				150.00%
Performance Stock Units | 2021 Incentive Award Plan | Maximum | One Senior Advisor
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Performance stock, stock price increase percentage				300.00%