Consolidated Statements of Operations and Comprehensive Loss ₩ in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares	Dec. 31, 2018 KRW (₩) shares	Dec. 31, 2017 $ / shares	Dec. 31, 2017 KRW (₩) shares
Revenue
Total revenue		₩ 4,589,203		₩ 3,972,111
Cost of revenue
Total cost of revenue		3,069,644		3,615,738
Gross margin		1,519,559		356,373
Selling, general and administrative expenses		2,108,221		2,731,354
Research and development		374,944		51,766
Loss from operations		(963,606)		(2,426,747)
Other expense:
Interest expense, net		(161,072)		(226,721)
Other income (expense), net		2,868		(6,640)
Total other expense		(158,204)		(233,361)
Loss before provision for income taxes		(1,121,810)		(2,660,108)
Income tax provision (benefit)		16,850		(9,118)
Net loss		₩ (1,138,660)		₩ (2,650,990)
Net loss per common share | $ / shares	$ (50)		$ (308)
Weighted average common shares outstanding | shares		22,728,538		8,601,977
Net loss		₩ (1,138,660)		₩ (2,650,990)
Other comprehensive income:
Foreign exchange translation loss		(114,215)		(15,781)
Remeasurement of pension liabilities		(44,806)		32,326
Other comprehensive income (loss), net of tax:		(159,021)		16,545
Comprehensive loss		(1,297,681)		(2,634,445)
Product [Member]
Revenue
Total revenue		2,445,340		1,866,863
Cost of revenue
Total cost of revenue		1,736,532		1,677,034
Service [Member]
Revenue
Total revenue		2,143,863		2,105,248
Cost of revenue
Total cost of revenue		₩ 1,333,112		₩ 1,938,704