Debt - Related Party Debt (Details) $ in Thousands, ₩ in Millions	Sep. 22, 2023 USD ($) agreement	Sep. 30, 2023 USD ($) shares	Sep. 30, 2023 KRW (₩) shares	Sep. 22, 2023 KRW (₩) agreement	Sep. 12, 2023 USD ($) customer Rate shares	Sep. 12, 2023 KRW (₩) customer Rate shares	May 12, 2023 USD ($)	May 12, 2023 KRW (₩)	Jan. 31, 2023 USD ($)	Jan. 31, 2023 KRW (₩)	Dec. 31, 2022 USD ($) shares	Oct. 31, 2022 USD ($)	Oct. 31, 2022 KRW (₩)
Debt Instrument [Line Items]
Common stock, outstanding (in shares) | shares		31,954,000	31,954,000								30,968,000
Inventories | $		$ 107,741									$ 94,288
Investor | November 2022 DNI Loan
Debt Instrument [Line Items]
DNI Loan												$ 5,000	₩ 7,200.0
Interest rate												6.00%	6.00%
Investor | February 2023 DNI Loan
Debt Instrument [Line Items]
DNI Loan									$ 4,100	₩ 5,000.0
Interest rate									7.00%	7.00%
Investor | May 2023 DNI Loan
Debt Instrument [Line Items]
DNI Loan							$ 3,000	₩ 4,000.0
Interest rate							7.00%	7.00%
Investor | DNI Loan Agreements | Secured Debt
Debt Instrument [Line Items]
DNI Loan	$ 29,900			₩ 39,600.0
Number of loan agreements | agreement	2			2
Term of loan agreement	3 years
Number of customers, receivables pledged as collateral | customer					2	2
Debt covenant, amount of cash | ₩						₩ 1,300.0
Debt covenant, value of cash, accounts receivable and inventory | ₩						₩ 33,000.0
Debt obligations		$ 29,300	₩ 39,600.0
Investor | DNI Loan Agreements | Secured Debt | Debt Instrument, Covenant, Period One
Debt Instrument [Line Items]
Maximum leverage ratio					600.00%	600.00%
Investor | DNI Loan Agreements | Secured Debt | Debt Instrument, Covenant, Period Two
Debt Instrument [Line Items]
Maximum leverage ratio					500.00%	500.00%
Investor | DNI Loan Agreements | Secured Debt | Debt Instrument, Covenant, Period Three
Debt Instrument [Line Items]
Maximum leverage ratio					400.00%	400.00%
Investor | DNI Loan Agreements | Secured Debt | Asset Pledged as Collateral
Debt Instrument [Line Items]
Inventories					$ 63,500	₩ 85,700.0
Amount of receivables pledged as collateral					12,000	16,200.0
Investor | DNI Loan Agreements | Secured Debt | Asset Pledged as Collateral | Minimum
Debt Instrument [Line Items]
Inventories					$ 25,900	₩ 35,000.0
Investor | DNI Loan Agreements | Secured Debt | DZS California | Asset Pledged as Collateral
Debt Instrument [Line Items]
Common stock, outstanding (in shares) | shares					9,999,999	9,999,999