Related Parties and Variable Interest Entity - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 30, 2020 shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Feb. 29, 2024	Dec. 31, 2023 USD ($)	Feb. 28, 2023 USD ($)
Related Parties And Variable Interest Entity [Line Items]
Operating lease expenses				$ 5,294	$ 6,429
Income from Sublease		$ 100	$ 200	$ 200	300
loan Issued							$ 400
Variable interest management fee				1
Dividend		17,300
NAVER | Private Placement | Common Stock
Related Parties And Variable Interest Entity [Line Items]
Shares of common stock | shares				2,380,952
Aggregate purchase price				$ 50,000
Related Parties | NAVER
Related Parties And Variable Interest Entity [Line Items]
loan Issued								$ 11,600
Fixed interest pecentage						4.60%		5.26%
Dividend				16,600
Related Parties | NAVER | Leasing Office Space
Related Parties And Variable Interest Entity [Line Items]
Operating lease expenses		1,500	1,500	3,000	3,100
Lease obligation		1,900		1,900			$ 21,300
Income from Sublease		100	$ 200	200	$ 300
Non-Employee Director | Stock Options
Related Parties And Variable Interest Entity [Line Items]
Stock options exchange for non-director services | shares	2,832,270
eBOOK Initiative Japan Co., Ltd.
Related Parties And Variable Interest Entity [Line Items]
Total gross reimbursement costs received		5,700		12,000
eBOOK Initiative Japan Co., Ltd. | Cost of Revenue
Related Parties And Variable Interest Entity [Line Items]
Total gross reimbursement costs received		3,700		7,600
eBOOK Initiative Japan Co., Ltd. | Marketing
Related Parties And Variable Interest Entity [Line Items]
Total gross reimbursement costs received		1,600		3,500
eBOOK Initiative Japan Co., Ltd. | General and Administrative Expenses
Related Parties And Variable Interest Entity [Line Items]
Total gross reimbursement costs received		$ 500		$ 900