Commitments and Contingencies - Schedule of Lease Cost and Other Information (Details)	6 Months Ended
	Jun. 30, 2019 KRW (₩)
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	₩ 65,506
Short-term lease cost	2,400
Total lease cost	67,906
Cash paid for amounts included in the measurement of lease liabilities	67,906
Operating cash flows from operating leases	₩ 67,906
Weighted-average remaining lease term - operating leases	2 years 8 months 12 days
Weighted-average discount rate - operating leases	5.74%