Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - KRW (₩) ₩ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue
Total revenue	₩ 1,647,969	₩ 1,053,739	₩ 3,595,221	₩ 3,412,423
Cost of revenue
Total cost of revenue	740,883	877,720	1,669,278	2,423,708
Gross margin	907,086	176,019	1,925,943	988,715
Selling, general and administrative expenses	187,595	384,803	1,433,516	1,365,043
Research and development	52,486	17,841	229,530	234,174
Income (Loss) from operations	667,005	(226,625)	262,897	(610,502)
Other expense:
Interest expense, net	(25,199)	(43,325)	(109,000)	(122,231)
Other income (expense), net	(6,348)	(1,043)	(19,179)	6,197
Total other expense	(31,547)	(44,368)	(128,179)	(116,034)
Income (Loss) before provision for income taxes	635,458	(270,993)	134,718	(726,536)
Income tax provision (benefit)	(672)	(295)	10,987	1,901
Net income (loss)	₩ 636,130	₩ (270,698)	₩ 123,731	₩ (728,437)
Basic net income (loss) per share	₩ 27.47	₩ (11.81)	₩ 5.36	₩ (32.14)
Diluted net income (loss) per share	₩ 22.55	₩ (11.81)	₩ 4.29	₩ (32.14)
Basic weighted average shares outstanding	23,159,105	22,927,992	23,065,136	22,661,323
Diluted weighted average shares outstanding	28,209,110	22,927,992	28,871,553	22,661,323
Net income (loss)	₩ 636,130	₩ (270,698)	₩ 123,731	₩ (728,437)
Other comprehensive loss:
Foreign exchange translation gain (loss)	(12,143)	(9,622)	(23,485)	1,545
Remeasurement of pension liabilities	1,787	1,047	(29,215)	(7,786)
Other comprehensive loss, net of tax:	(10,356)	(8,575)	(52,700)	(6,241)
Comprehensive income (loss)	625,774	(279,273)	71,031	(734,678)
Product [Member]
Revenue
Total revenue	865,708	379,398	1,989,696	1,397,830
Cost of revenue
Total cost of revenue	437,396	262,999	884,978	938,817
Service [Member]
Revenue
Total revenue	782,261	674,341	1,605,525	2,014,593
Cost of revenue
Total cost of revenue	₩ 303,487	₩ 614,721	₩ 784,300	₩ 1,484,891