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Accounts and Other Receivables - Summary of Accounts and Other Receivables (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivables
Trade And Other Receivables [Line Items]
Non-related party	₩ 57,793	₩ 29,697
Related party	2,547	2,721
Less : Loss allowance	(579)	(165)	₩ (22)	₩ (123)
Accounts receivables, net	59,761	32,253
Other Receivables
Trade And Other Receivables [Line Items]
Non-related party	13	60
Less : Loss allowance	(5)	(4)	₩ (84)	₩ (46)
Other receivables, net	₩ 8	₩ 56

X

- Definition

Trade and other receivables due from non related parties.

+ References

No definition available.

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- Definition

Trade and other receivables.

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- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
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- Definition

The amount receivable by the entity that it does not separately disclose in the same statement or note.

+ References

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- Definition

The amount of receivables due from related parties. [Refer: Related parties [member]]

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- Definition

The amount due from customers for goods and services sold.

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