Debt - Additional Information (Details) $ / shares in Units, $ in Thousands, ₩ in Billions									12 Months Ended
	Dec. 29, 2023 USD ($) $ / shares shares	Sep. 22, 2023 USD ($)	Sep. 12, 2023 LoanAgreement	Sep. 05, 2023 USD ($)	May 08, 2023 USD ($)	Feb. 15, 2023 USD ($)	May 27, 2022 USD ($)	Feb. 09, 2022 USD ($)	Dec. 31, 2023 USD ($) Customer $ / shares Rate shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2023 KRW (₩) Customer Rate	Dec. 07, 2023 USD ($)	Dec. 07, 2023 KRW (₩)	Sep. 22, 2023 KRW (₩)	Aug. 25, 2023 USD ($)	Aug. 25, 2023 KRW (₩)	Aug. 17, 2023 USD ($)	Aug. 17, 2023 KRW (₩)	Jul. 31, 2023 USD ($)	Jul. 31, 2023 KRW (₩)	Jun. 15, 2023 USD ($)	Jun. 15, 2023 KRW (₩)	May 12, 2023 USD ($)	May 12, 2023 KRW (₩)	Mar. 30, 2023 USD ($)	Mar. 30, 2023 KRW (₩)	Jan. 31, 2023 USD ($)	Jan. 31, 2023 KRW (₩)	Oct. 31, 2022 USD ($)	Oct. 31, 2022 KRW (₩)
Line Of Credit Facility [Line Items]
Number of loan agreements | LoanAgreement			2
Short term loan									$ 19,600
Line of credit									19,636	$ 4,000
Debt obligations									37,900
Loss on extinguishment of debt									$ 594	$ 0
Additional unregistered shares of its common stock, par value | $ / shares									$ 0.001	$ 0.001
Warrant recognized									$ 7,200
DNI Related Party Loan									30,600	$ 0
November 2022 DNI Loan | Short-Term Debt | Investor
Line Of Credit Facility [Line Items]
Interest rate																													6.00%	6.00%
DNI Related Party Loan																													$ 5,000	₩ 7.2
February 2023 DNI Loan | Short-Term Debt | Investor
Line Of Credit Facility [Line Items]
Interest rate																											7.00%	7.00%
DNI Related Party Loan																											$ 4,100	₩ 5.0
May 2023 DNI Loan | Short-Term Debt | Investor
Line Of Credit Facility [Line Items]
Interest rate																							7.00%	7.00%
DNI Related Party Loan																							$ 3,000	₩ 4.0
DNI Loan Agreements | Investor
Line Of Credit Facility [Line Items]
Interest rate		8.00%												8.00%
Debt instrument, term		3 years	3 years
DNI Related Party Loan									$ 30,600		₩ 39.6
Debt aggregate principal amount received		$ 29,900												₩ 39.6
DNI Loan Agreements | DZS California, Inc | Investor
Line Of Credit Facility [Line Items]
Pledged shares, to secure loan obligations | shares									9,999,999
DNI Loan Agreements | DZS California, Inc | Investor | Accounts receivable
Line Of Credit Facility [Line Items]
Collateral for related party loans									$ 600		₩ 0.8
Number of customers included in accounts receivable collateral | Customer									2		2
Bank and Trade Facilities - Foreign Operations
Line Of Credit Facility [Line Items]
Weighted average short-term obligations outstanding interest rate									5.40%		5.40%
Short term borrowings outstanding									$ 9,800
Interest expense short term borrowings									600
Short term loan									19,600
Industrial Bank of Korea Loan
Line Of Credit Facility [Line Items]
Interest rate																									6.30%	6.30%
Short term loan																									$ 900	₩ 1.2
Shinhan Bank
Line Of Credit Facility [Line Items]
Interest rate																					5.20%	5.20%
Short term loan									4,600		₩ 6.0										$ 4,700	₩ 6.0
Kookmin Bank
Line Of Credit Facility [Line Items]
Interest rate																			5.80%	5.80%
Short term loan									1,500		2.0								$ 1,700	₩ 2.0
Hana Bank
Line Of Credit Facility [Line Items]
Interest rate																	5.90%	5.90%
Short term loan									1,500		1.9						$ 1,500	₩ 2.0
The Export Import Bank of Korea
Line Of Credit Facility [Line Items]
Interest rate															4.80%	4.80%
Short term loan									3,900		5.0				$ 3,800	₩ 5.0
Woori Bank
Line Of Credit Facility [Line Items]
Interest rate												5.80%	5.80%
Collateral for related party loans												$ 3,700	₩ 4.8
Short term loan									3,100		₩ 4.0	$ 3,000	₩ 4.0
Korea Development Bank
Line Of Credit Facility [Line Items]
Short term loan									5,000
Line of credit				$ 10,000
JPMorgan Credit Facility | Letter of Credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity								$ 15,000
EdgeCo, LLC
Line Of Credit Facility [Line Items]
Fixed interest rate, Percentage | $ / shares	$ 1.84
Shares of Common Stock underlying | shares	6,100,000
Warrant recognized	$ 7,500
Warrant issued to subscribe common Stock | shares	6,100,000
EdgeCo, LLC | Term Loan
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 15,000
Interest rate	13.00%
Debt instrument, term	3 years
Debt obligations									7,300
Maturity date	Dec. 29, 2026
Additional debt financing	$ 15,000
Additional unregistered shares of its common stock, par value | $ / shares	$ 0.001
Unamortized debt discount									7,500
Deferred issuance cost									$ 200
Ownership of Outstanding Common Stock	4.90%
JPM Credit Agreement | Investor
Line Of Credit Facility [Line Items]
Credit agreement, expiration date									Dec. 14, 2023
DNI | Loan Agreement | Investor
Line Of Credit Facility [Line Items]
Maximum leverage ratio at the end of each of the second and third quarter of 2024 | Rate									600.00%		600.00%
Maximum leverage ratio from the fourth quarter of 2024 through the second quarter of 2025 | Rate									500.00%		500.00%
Maximum leverage ratio from the third quarter of 2025 until the DNI loan is repaid in full | Rate									400.00%		400.00%
Cash | ₩											₩ 1.3
Combination Of Total Of Cash, Accounts Receivable And Inventory | ₩											₩ 33.0
Revolving Credit Agreement | JPMorgan Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity							$ 30,000	30,000
Credit facility, current borrowing capacity								$ 10,000
Credit agreement, expiration date								Feb. 09, 2024
Amendment to Credit Agreement | JPMorgan Credit Facility
Line Of Credit Facility [Line Items]
Maturity date of revolving commitments							May 27, 2025
Credit facility covenant description									modifies the financial covenants to (i) increase the maximum permitted leverage ratio to 3.00 to 1.00 through September 30, 2022, 2.50 to 1.00 thereafter through September 30, 2023, and 2.00 to 1.00 thereafter and (ii) replace the minimum liquidity requirement with a minimum permitted fixed charge coverage ratio of 1.25 to 1.00.
Maximum permitted leverage ratio through September 30, 2022							3
Maximum permitted leverage ratio through September 30, 2023							2.5
Minimum permitted fixed charge coverage ratio							1.25
Maximum permitted leverage ratio after September 30 2023							2
Amendment to Credit Agreement | JPMorgan Credit Facility | Maximum
Line Of Credit Facility [Line Items]
Commitment fee percentage on unused capacity							0.35%
Amendment to Credit Agreement | JPMorgan Credit Facility | Minimum
Line Of Credit Facility [Line Items]
Commitment fee percentage on unused capacity							0.25%
Amendment to Credit Agreement | JPMorgan Credit Facility | Letter of Credit | Maximum
Line Of Credit Facility [Line Items]
Commitment fee percentage							3.50%
Amendment to Credit Agreement | JPMorgan Credit Facility | Letter of Credit | Minimum
Line Of Credit Facility [Line Items]
Commitment fee percentage							3.00%
Amendment to Credit Agreement | JPMorgan Credit Facility | Term Loan
Line Of Credit Facility [Line Items]
Maximum borrowing capacity							$ 25,000
Credit agreement, expiration date							May 27, 2027
Second Amendment to Credit Agreement
Line Of Credit Facility [Line Items]
Minimum EBITDA for the fiscal quarter ending June 30, 2023						$ 1,000
Minimum EBITDA for fiscal quarter ending March 31, 2023						$ 1,000
Second Amendment to Credit Agreement | JPMorgan Credit Facility
Line Of Credit Facility [Line Items]
Commitment fee percentage on unused capacity						0.40%
Maximum permitted leverage ratio through September 30, 2023						2.5
Maximum permitted leverage ratio until December 31 2023						1.25
Minimum liquidity for fiscal quarter ending March 31, 2023						$ 30,000
Minimum liquidity fiscal quarters ending June 30, 2023 and September 30, 2023						35,000
Minimum liquidity any time until September 30, 2023						$ 20,000
Leverage ratio						250.00%
Third Amendment To Credit Agreement | JPMorgan Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity																					$ 25,000
Minimum EBITDA for the fiscal quarter ending March 31, 2023					$ 1,000
Borrowing base decrease through June 30, 2023					5,000
Additional borrowing base decrease after June 30, 2023					$ 5,000
Leverage ratio (in excess of)					2.5