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Financial Assets at Fair Value through Other Comprehensive Income (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2018
Dec. 31, 2017
Financial assets at fair value through other comprehensive income [Line Items]    
Acquisition Cost ₩ 650,513  
Book value 399,495 ₩ 0
Fair value 399,495  
Listed equity securities    
Financial assets at fair value through other comprehensive income [Line Items]    
Acquisition Cost 365,843  
Book value 210,056 0
Fair value ₩ 210,056  
Korea District Heating Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,264,068  
Ownership 19.55%  
Acquisition Cost ₩ 173,201  
Book value 129,051  
Fair value ₩ 129,051  
Ssangyong Motor Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 38,568  
Ownership 0.03%  
Acquisition Cost ₩ 428  
Book value 153  
Fair value ₩ 153  
Korea Line Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 18  
Ownership 0.00%  
Acquisition Cost ₩ 1  
Book value 0  
Fair value ₩ 0  
Namkwang Engineering & Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 121  
Ownership 0.00%  
Acquisition Cost ₩ 15  
Book value 1  
Fair value ₩ 1  
Bumyang Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 35  
Ownership 0.00%  
Acquisition Cost ₩ 2  
Book value 0  
Fair value ₩ 0  
ELCOMTEC Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 32,875  
Ownership 0.04%  
Acquisition Cost ₩ 217  
Book value 61  
Fair value ₩ 61  
PAN ocean Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,492  
Ownership 0.00%  
Acquisition Cost ₩ 14  
Book value 7  
Fair value ₩ 7  
Dongbu Corporation    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 955  
Ownership 0.02%  
Acquisition Cost ₩ 12  
Book value 7  
Fair value ₩ 7  
KSP Co., Ltd. [Member]    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22,539  
Ownership 0.08%  
Acquisition Cost ₩ 24  
Book value 32  
Fair value ₩ 32  
STX Heavy Industries Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 5,057  
Ownership 0.13%  
Acquisition Cost ₩ 191  
Book value 29  
Fair value ₩ 29  
Codes Combine Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 291  
Ownership 0.00%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
PT Adaro Energy Tbk    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 480,000,000  
Ownership 1.50%  
Acquisition Cost ₩ 71,554  
Book value 44,790  
Fair value ₩ 44,790  
Energy Fuels Inc.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,711,814  
Ownership 1.91%  
Acquisition Cost ₩ 16,819  
Book value 5,435  
Fair value ₩ 5,435  
Baralaba Coal Company Limited    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 99,763  
Ownership 0.07%  
Acquisition Cost ₩ 18,445  
Book value 0  
Fair value ₩ 0  
Denison Mines Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 58,284,000  
Ownership 10.42%  
Acquisition Cost ₩ 84,134  
Book value 30,122  
Fair value ₩ 30,122  
Fission 3.0 [Member]    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [1] 75,000  
Ownership [1] 0.14%  
Acquisition Cost [1] ₩ 0  
Book value [1] 13  
Fair value [1] ₩ 13  
Fission Uranium Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 800,000  
Ownership 0.16%  
Acquisition Cost ₩ 785  
Book value 354  
Fair value 354  
Unlisted equity securities    
Financial assets at fair value through other comprehensive income [Line Items]    
Acquisition Cost [2] 284,670  
Book value 189,439 [2] ₩ 0
Fair value [2] ₩ 189,439  
Intellectual Discovery, Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,000,000  
Ownership 8.81%  
Acquisition Cost ₩ 5,000  
Book value 954  
Fair value ₩ 954  
Hwan Young Steel Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 10,916  
Ownership 0.14%  
Acquisition Cost ₩ 1,092  
Book value 97  
Fair value ₩ 97  
SAMBO AUTO. Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 15,066  
Ownership 0.02%  
Acquisition Cost ₩ 38  
Book value 38  
Fair value ₩ 38  
Mobo Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 504  
Ownership 0.00%  
Acquisition Cost ₩ 14  
Book value 14  
Fair value ₩ 14  
Dae Kwang Semiconductor Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 589  
Ownership 0.07%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Sanbon Department Store    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 828  
Ownership 0.01%  
Acquisition Cost ₩ 124  
Book value 3  
Fair value ₩ 3  
Miju Steel Mfg. Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,097  
Ownership 0.23%  
Acquisition Cost ₩ 50  
Book value 50  
Fair value ₩ 50  
Sungwon Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [3] 117  
Ownership [3] 0.07%  
Acquisition Cost [3] ₩ 15  
Book value [3] 15  
Fair value [3] ₩ 15  
Hana Civil Engineering Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 23  
Ownership 0.00%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
KC Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 839  
Ownership 0.02%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
IMHWA Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 329  
Ownership 0.11%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
DALIM Special Vehicle Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 58  
Ownership 0.08%  
Acquisition Cost ₩ 10  
Book value 10  
Fair value ₩ 10  
ASA JEONJU Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 34,846  
Ownership 1.34%  
Acquisition Cost ₩ 697  
Book value 69  
Fair value ₩ 69  
Moonkyung Silica Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 42  
Ownership 0.56%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
Sungkwang Timber Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 9  
Ownership 0.34%  
Acquisition Cost ₩ 4  
Book value 4  
Fair value ₩ 4  
Yongbo Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 61  
Ownership 0.20%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
HJ Steel Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 218  
Ownership 0.07%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
KS Remicon Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12  
Ownership 0.04%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Joongang Platec Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3,591  
Ownership 0.75%  
Acquisition Cost ₩ 72  
Book value 35  
Fair value ₩ 35  
Pyungsan SI Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 434  
Ownership 0.01%  
Acquisition Cost ₩ 9  
Book value 9  
Fair value ₩ 9  
Samgong Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12  
Ownership 0.01%  
Acquisition Cost ₩ 7  
Book value 7  
Fair value ₩ 7  
Joongang Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 540  
Ownership 0.12%  
Acquisition Cost ₩ 8  
Book value 8  
Fair value ₩ 8  
AJS Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12,906  
Ownership 0.23%  
Acquisition Cost ₩ 32  
Book value 32  
Fair value ₩ 32  
SHIN-E B&P Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 119  
Ownership 0.13%  
Acquisition Cost ₩ 10  
Book value 0  
Fair value ₩ 0  
MSE Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 429  
Ownership 0.13%  
Acquisition Cost ₩ 9  
Book value 9  
Fair value ₩ 9  
Ilrim Nano Tec Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,520  
Ownership 0.07%  
Acquisition Cost ₩ 15  
Book value 15  
Fair value ₩ 15  
Youngjin Hi-Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,512  
Ownership 0.25%  
Acquisition Cost ₩ 126  
Book value 21  
Fair value ₩ 21  
Buyoung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 270  
Ownership 0.00%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Ilsuk Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 152  
Ownership 0.17%  
Acquisition Cost ₩ 10  
Book value 10  
Fair value ₩ 10  
Dongyang Telecom Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,760  
Ownership 0.01%  
Acquisition Cost ₩ 11  
Book value 11  
Fair value ₩ 11  
Jongwon Remicon Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 31  
Ownership 0.18%  
Acquisition Cost ₩ 13  
Book value 13  
Fair value ₩ 13  
Zyle Daewoo Motor Sales Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22  
Ownership 0.00%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
Daewoo Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 8  
Ownership 0.00%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
Seyang Inc.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 537  
Ownership 0.05%  
Acquisition Cost ₩ 27  
Book value 27  
Fair value ₩ 27  
Seungri Enterprise Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 93  
Ownership 0.05%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Onggane Food Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 5  
Ownership 0.07%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Shin-E P&C Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,569  
Ownership 0.64%  
Acquisition Cost ₩ 111  
Book value 3  
Fair value ₩ 3  
Ejung Ad Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 132  
Ownership 0.09%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Solvus Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,056  
Ownership 0.04%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Myung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 89  
Ownership 0.05%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
Shinil Engineering Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 887  
Ownership 0.06%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Biwang Industry Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 406  
Ownership 0.04%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
Huimun Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 263  
Ownership 0.26%  
Acquisition Cost ₩ 4  
Book value 4  
Fair value ₩ 4  
Young Sung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 89  
Ownership 0.40%  
Acquisition Cost ₩ 26  
Book value 26  
Fair value ₩ 26  
Yuil Industrial Electronics Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 804  
Ownership 0.32%  
Acquisition Cost ₩ 15  
Book value 15  
Fair value ₩ 15  
DN TEK Inc.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12,401  
Ownership 0.29%  
Acquisition Cost ₩ 61  
Book value 5  
Fair value ₩ 5  
Kwang Jin Structure Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3,072  
Ownership 0.60%  
Acquisition Cost ₩ 31  
Book value 31  
Fair value ₩ 31  
Woojin Industry Corporation    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3  
Ownership 0.00%  
Acquisition Cost ₩ 16  
Book value 16  
Fair value ₩ 16  
Kwang Sung Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 325  
Ownership 0.35%  
Acquisition Cost ₩ 7  
Book value 7  
Fair value ₩ 7  
Futech Mold Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 274  
Ownership 0.27%  
Acquisition Cost ₩ 14  
Book value 14  
Fair value ₩ 14  
Woojoo Environment Ind. Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 101  
Ownership 0.11%  
Acquisition Cost ₩ 13  
Book value 13  
Fair value ₩ 13  
Hyungji Esquire Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 61  
Ownership 0.02%  
Acquisition Cost ₩ 22  
Book value 22  
Fair value ₩ 22  
Kolmar Pharma Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,426  
Ownership 0.01%  
Acquisition Cost ₩ 52  
Book value 3  
Fair value ₩ 3  
Morado Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 209  
Ownership 0.04%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
Myung Sung Tex Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 20  
Ownership 0.00%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
Kwang Sung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 610  
Ownership 0.53%  
Acquisition Cost ₩ 31  
Book value 31  
Fair value ₩ 31  
Seen Business and Technology co., Ltd. (formerly, EverTechno. Co.,Ltd.)    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 29,424  
Ownership 0.73%  
Acquisition Cost ₩ 148  
Book value 7  
Fair value ₩ 7  
Autowel Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 260  
Ownership 0.38%  
Acquisition Cost ₩ 14  
Book value 14  
Fair value ₩ 14  
Woobang Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 8  
Ownership 0.00%  
Acquisition Cost ₩ 8  
Book value 8  
Fair value ₩ 8  
Shin Pyung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 6  
Ownership 0.03%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
JMC Heavy Industries Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,724  
Ownership 0.10%  
Acquisition Cost ₩ 27  
Book value 2  
Fair value ₩ 2  
Najin Steel Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 37  
Ownership 0.06%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Sinkwang Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,091  
Ownership 1.68%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Crystal Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22  
Ownership 0.07%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
Elephant & Friends Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 563  
Ownership 0.61%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Mireco Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 109  
Ownership 0.25%  
Acquisition Cost ₩ 11  
Book value 11  
Fair value ₩ 11  
L&K Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,615  
Ownership 0.60%  
Acquisition Cost ₩ 24  
Book value 24  
Fair value ₩ 24  
JO Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,263  
Ownership 0.62%  
Acquisition Cost ₩ 25  
Book value 25  
Fair value ₩ 25  
Kendae Printing Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 422  
Ownership 0.60%  
Acquisition Cost ₩ 21  
Book value 21  
Fair value ₩ 21  
Dauning Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 231  
Ownership 0.41%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Korea Trecision Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22  
Ownership 0.45%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Ace Track Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3,130  
Ownership 1.08%  
Acquisition Cost ₩ 219  
Book value 59  
Fair value ₩ 59  
Yoo-A Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 105  
Ownership 0.20%  
Acquisition Cost ₩ 11  
Book value 11  
Fair value ₩ 11  
Dung Hwan Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 531  
Ownership 0.02%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Hurim Biocell Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,021  
Ownership 0.00%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Smart Power Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 133,333  
Ownership 4.35%  
Acquisition Cost ₩ 200  
Book value 200  
Fair value ₩ 200  
Sunjin Power Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 4,941  
Ownership 0.92%  
Acquisition Cost ₩ 247  
Book value 32  
Fair value ₩ 32  
Haseung Industries Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 55  
Ownership 0.62%  
Acquisition Cost ₩ 28  
Book value 28  
Fair value ₩ 28  
Beer Yeast Korea Inc.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,388  
Ownership 0.43%  
Acquisition Cost ₩ 7  
Book value 7  
Fair value ₩ 7  
Korea Bio Red Ginseng Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 194  
Ownership 0.09%  
Acquisition Cost ₩ 10  
Book value 10  
Fair value ₩ 10  
B CON Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 96  
Ownership 1.16%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
SsangMa Machine Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 4  
Ownership 0.05%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Ace Integration Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 105  
Ownership 0.09%  
Acquisition Cost ₩ 24  
Book value 24  
Fair value ₩ 24  
AceInti Agricultural Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 16  
Ownership 0.02%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
KyungDong Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 130  
Ownership 0.01%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
ChunWon Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 193  
Ownership 0.19%  
Acquisition Cost ₩ 39  
Book value 39  
Fair value ₩ 39  
WonIl Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 999  
Ownership 0.15%  
Acquisition Cost ₩ 50  
Book value 50  
Fair value ₩ 50  
SungLim Industrial Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 29  
Ownership 0.03%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Korea Minerals Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 191  
Ownership 0.05%  
Acquisition Cost ₩ 134  
Book value 1  
Fair value ₩ 1  
HyoDong Development Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 119  
Ownership 0.15%  
Acquisition Cost ₩ 24  
Book value 24  
Fair value ₩ 24  
Haspe Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 652  
Ownership 0.55%  
Acquisition Cost ₩ 20  
Book value 20  
Fair value ₩ 20  
JoHyun Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 350  
Ownership 1.56%  
Acquisition Cost ₩ 18  
Book value 18  
Fair value ₩ 18  
KC Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 5,107  
Ownership 0.17%  
Acquisition Cost ₩ 26  
Book value 26  
Fair value ₩ 26  
SeongJi Industrial Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 41  
Ownership 0.05%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Dong Yang Metal Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,951  
Ownership 1.97%  
Acquisition Cost ₩ 161  
Book value 147  
Fair value ₩ 147  
Seyang Precision Ind.Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 829  
Ownership 0.23%  
Acquisition Cost ₩ 41  
Book value 41  
Fair value ₩ 41  
Dooriwon Food System Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 13  
Ownership 0.27%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
ShinShin Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 339  
Ownership 1.12%  
Acquisition Cost ₩ 17  
Book value 17  
Fair value ₩ 17  
Kitorang Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 165  
Ownership 0.24%  
Acquisition Cost ₩ 49  
Book value 49  
Fair value ₩ 49  
Sung Kwang Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 23  
Ownership 0.37%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Shinheung petrol. Co. Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 699  
Ownership 0.14%  
Acquisition Cost ₩ 35  
Book value 35  
Fair value ₩ 35  
Force TEC Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3,501  
Ownership 0.02%  
Acquisition Cost ₩ 18  
Book value 18  
Fair value ₩ 18  
Samsung Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 486  
Ownership 1.28%  
Acquisition Cost ₩ 97  
Book value 36  
Fair value ₩ 36  
Tae Hyung Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 28  
Ownership 0.43%  
Acquisition Cost ₩ 20  
Book value 20  
Fair value ₩ 20  
Samyangplant Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 323  
Ownership 0.60%  
Acquisition Cost ₩ 16  
Book value 16  
Fair value ₩ 16  
Younil Metal Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 41  
Ownership 0.21%  
Acquisition Cost ₩ 21  
Book value 21  
Fair value ₩ 21  
Myungjin Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 20  
Ownership 0.54%  
Acquisition Cost ₩ 4  
Book value 4  
Fair value ₩ 4  
Hankook Precision Ind Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 110  
Ownership 0.06%  
Acquisition Cost ₩ 11  
Book value 11  
Fair value ₩ 11  
Borneo International Furniture Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [4] 4,000  
Ownership [4] 0.16%  
Acquisition Cost [4] ₩ 97  
Book value [4] 13  
Fair value [4] ₩ 13  
CJ Paradise Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 24  
Ownership 0.02%  
Acquisition Cost ₩ 12  
Book value 12  
Fair value ₩ 12  
Han Young Technology Company Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 35  
Ownership 0.00%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
STX Offshore & Shipbuilding Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 8,622  
Ownership 0.25%  
Acquisition Cost ₩ 1,078  
Book value 1,078  
Fair value ₩ 1,078  
Ptotronics Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 843  
Ownership 0.42%  
Acquisition Cost ₩ 84  
Book value 6  
Fair value ₩ 6  
NFT Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 136  
Ownership 0.40%  
Acquisition Cost ₩ 8  
Book value 8  
Fair value ₩ 8  
Echoroba Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 157  
Ownership 0.02%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Hyundaitech Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,363  
Ownership 0.87%  
Acquisition Cost ₩ 27  
Book value 27  
Fair value ₩ 27  
Dasan Material Co.Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 29  
Ownership 0.04%  
Acquisition Cost ₩ 22  
Book value 22  
Fair value ₩ 22  
Fish World Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 47  
Ownership 0.21%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
SG Shinsung Engineering and Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 10  
Ownership 0.00%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Samdo Industry Electric Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 48  
Ownership 0.02%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Taejung Industries Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 9,268  
Ownership 0.30%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Shinsei Trading Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 64  
Ownership 0.72%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Dynamic Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 111  
Ownership 0.19%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Green Alchemy Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 38,202  
Ownership 1.48%  
Acquisition Cost ₩ 191  
Book value 17  
Fair value ₩ 17  
Youone TBM Engineering & Construction Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 615  
Ownership 0.27%  
Acquisition Cost ₩ 31  
Book value 31  
Fair value ₩ 31  
KM Leatech    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,648  
Ownership 0.98%  
Acquisition Cost ₩ 8  
Book value 8  
Fair value ₩ 8  
Wonil T&I Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 229  
Ownership 0.17%  
Acquisition Cost ₩ 23  
Book value 23  
Fair value ₩ 23  
Semist Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 555  
Ownership 0.80%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
DS POWER Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 580,000  
Ownership 2.34%  
Acquisition Cost ₩ 2,900  
Book value 916  
Fair value ₩ 916  
Sewon Bus Co.,Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12  
Ownership 0.00%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
Enertec Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 7,937  
Ownership 0.19%  
Acquisition Cost ₩ 44  
Book value 44  
Fair value ₩ 44  
Sangji Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 20  
Ownership 0.26%  
Acquisition Cost ₩ 4  
Book value 4  
Fair value ₩ 4  
Bellie Doughnuts Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 64  
Ownership 0.07%  
Acquisition Cost ₩ 4  
Book value 4  
Fair value ₩ 4  
Possbell Engineering Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 36  
Ownership 0.64%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
AIRTECH Information communication Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,379  
Ownership 0.60%  
Acquisition Cost ₩ 12  
Book value 12  
Fair value ₩ 12  
CST co.,ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 4,998  
Ownership 0.28%  
Acquisition Cost ₩ 100  
Book value 100  
Fair value ₩ 100  
TN Inc.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,416  
Ownership 2.00%  
Acquisition Cost ₩ 71  
Book value 71  
Fair value ₩ 71  
Shin kwang Industrial Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 884  
Ownership 0.35%  
Acquisition Cost ₩ 55  
Book value 55  
Fair value ₩ 55  
Kiscom Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,493  
Ownership 0.04%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Seil Electronics Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,285  
Ownership 0.41%  
Acquisition Cost ₩ 286  
Book value 286  
Fair value ₩ 286  
Wonil laser Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 157  
Ownership 0.37%  
Acquisition Cost ₩ 16  
Book value 16  
Fair value ₩ 16  
Pyung Hwa Industrial Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3,388  
Ownership 3.00%  
Acquisition Cost ₩ 85  
Book value 85  
Fair value ₩ 85  
Navanakorn Electric Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [5] 4,442,800  
Ownership [5] 26.93%  
Acquisition Cost [5] ₩ 17,216  
Book value [5] 17,126  
Fair value [5] ₩ 17,126  
PT. Kedap Sayaaq    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 671  
Ownership 10.00%  
Acquisition Cost ₩ 18,540  
Book value 0  
Fair value ₩ 0  
Set Holding    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [6] 1,100,220  
Ownership [6] 2.50%  
Acquisition Cost [6] ₩ 229,255  
Book value [6] 161,983  
Fair value [6] ₩ 161,983  
PT. Cirebon Energi Prasarana    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22,420  
Ownership 10.00%  
Acquisition Cost ₩ 2,612  
Book value 2,507  
Fair value ₩ 2,507  
KODE NOVUS 1 LLC    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [7] 0  
Ownership [7] 10.00%  
Acquisition Cost [7] ₩ 0  
Book value [7] 0  
Fair value [7] ₩ 0  
Choheung packing Co.,Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 61  
Ownership 0.13%  
Acquisition Cost ₩ 12  
Book value 12  
Fair value ₩ 12  
Jaewoo Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 359  
Ownership 0.24%  
Acquisition Cost ₩ 11  
Book value 11  
Fair value ₩ 11  
Wooyang HC Co., Ltd    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares [8] 1,375  
Ownership [8] 0.01%  
Acquisition Cost [8] ₩ 159  
Book value [8] 159  
Fair value [8] ₩ 159  
Sungsan Parts Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 629  
Ownership 0.80%  
Acquisition Cost ₩ 63  
Book value 63  
Fair value ₩ 63  
KMT Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,411  
Ownership 0.93%  
Acquisition Cost ₩ 21  
Book value 21  
Fair value ₩ 21  
TheYeonriji Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 116  
Ownership 0.10%  
Acquisition Cost ₩ 6  
Book value 6  
Fair value ₩ 6  
Flusys Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 9  
Ownership 0.08%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
DaeSung Frontier Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 2,203  
Ownership 1.11%  
Acquisition Cost ₩ 221  
Book value 221  
Fair value ₩ 221  
DongSeo Electronics Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 323  
Ownership 0.07%  
Acquisition Cost ₩ 16  
Book value 16  
Fair value ₩ 16  
Daewoo Display Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 177  
Ownership 0.03%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Yeong-gwang Remicon Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 15  
Ownership 0.12%  
Acquisition Cost ₩ 2  
Book value 2  
Fair value ₩ 2  
NTS Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 143  
Ownership 0.22%  
Acquisition Cost ₩ 36  
Book value 36  
Fair value ₩ 36  
AID CO.,LTD.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,212  
Ownership 0.57%  
Acquisition Cost ₩ 36  
Book value 36  
Fair value ₩ 36  
Changwon Eco-friendly farming corporation    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 3  
Ownership 0.01%  
Acquisition Cost ₩ 0  
Book value 0  
Fair value ₩ 0  
Kumo Hitech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 6,697  
Ownership 0.53%  
Acquisition Cost ₩ 100  
Book value 100  
Fair value ₩ 100  
Kyung Pyo Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 186  
Ownership 0.76%  
Acquisition Cost ₩ 19  
Book value 19  
Fair value ₩ 19  
Daedong Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 617  
Ownership 0.55%  
Acquisition Cost ₩ 46  
Book value 46  
Fair value ₩ 46  
Doosung Heavy Industries Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 53  
Ownership 0.06%  
Acquisition Cost ₩ 5  
Book value 5  
Fair value ₩ 5  
Jangback Testiles Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 494  
Ownership 5.05%  
Acquisition Cost ₩ 49  
Book value 49  
Fair value ₩ 49  
Samjoo Hightech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 522  
Ownership 0.08%  
Acquisition Cost ₩ 3  
Book value 3  
Fair value ₩ 3  
Samkwang Chemical Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 204  
Ownership 1.27%  
Acquisition Cost ₩ 51  
Book value 51  
Fair value ₩ 51  
Taekwang Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,327  
Ownership 0.48%  
Acquisition Cost ₩ 93  
Book value 93  
Fair value ₩ 93  
Taekwang Precision Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 54  
Ownership 0.47%  
Acquisition Cost ₩ 54  
Book value 54  
Fair value ₩ 54  
SG Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 213  
Ownership 0.54%  
Acquisition Cost ₩ 21  
Book value 21  
Fair value ₩ 21  
Shinseung Chemical Industy Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 5  
Ownership 0.01%  
Acquisition Cost ₩ 60  
Book value 60  
Fair value ₩ 60  
KJ Alloy Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 368  
Ownership 0.20%  
Acquisition Cost ₩ 7  
Book value 7  
Fair value ₩ 7  
SM Hi-tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 22  
Ownership 0.39%  
Acquisition Cost ₩ 22  
Book value 22  
Fair value ₩ 22  
Keum Mun Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,320  
Ownership 0.97%  
Acquisition Cost ₩ 330  
Book value 330  
Fair value ₩ 330  
Puruen Environment Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 967  
Ownership 1.34%  
Acquisition Cost ₩ 19  
Book value 19  
Fair value ₩ 19  
Miretech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 9,111  
Ownership 0.27%  
Acquisition Cost ₩ 18  
Book value 18  
Fair value ₩ 18  
SIE Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 12  
Ownership 0.02%  
Acquisition Cost ₩ 1  
Book value 1  
Fair value ₩ 1  
Soongwon Ind. Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 150  
Ownership 0.40%  
Acquisition Cost ₩ 53  
Book value 53  
Fair value ₩ 53  
Sejin Hightech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 17,980  
Ownership 0.16%  
Acquisition Cost ₩ 18  
Book value 18  
Fair value ₩ 18  
Namcheong Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 7,096  
Ownership 0.28%  
Acquisition Cost ₩ 284  
Book value 284  
Fair value ₩ 284  
Eun Sung Enterprise Co.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,131  
Ownership 0.72%  
Acquisition Cost ₩ 17  
Book value 17  
Fair value ₩ 17  
Dongdo Basalt Industry Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 182  
Ownership 1.50%  
Acquisition Cost ₩ 73  
Book value 73  
Fair value ₩ 73  
Shinyoung Textiles Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 523  
Ownership 1.01%  
Acquisition Cost ₩ 52  
Book value 52  
Fair value ₩ 52  
Bugook Cast Iron Co.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 135  
Ownership 0.71%  
Acquisition Cost ₩ 14  
Book value 14  
Fair value ₩ 14  
Ilwoo Steel Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 41  
Ownership 0.28%  
Acquisition Cost ₩ 17  
Book value 17  
Fair value ₩ 17  
Dong-un Tech Co., Ltd.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 1,159  
Ownership 6.28%  
Acquisition Cost ₩ 81  
Book value 81  
Fair value ₩ 81  
Wongwang Door Corp.    
Financial assets at fair value through other comprehensive income [Line Items]    
Shares 575  
Ownership 1.00%  
Acquisition Cost ₩ 29  
Book value 29  
Fair value ₩ 29  
[1] The number of shares owned has changed due to the stock merge (4:1) during the year ended December 31, 2018.
[2] The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.
[3] The number of shares owned has changed due to the stock merge (5:1) during the year ended December 31, 2018.
[4] The number of shares owned has changed due to capital reduction without refund (3:1), the stock merge (10,000:1) and the stock split (1:2,000) during the year ended December 31, 2018
[5] Although the Company holds more than 20% of the equity shares of these investments, the Company cannot exercise significant influence.
[6] The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2018.
[7] As described in note 20, this is reclassified to financial assets at FVOCI due to loss of significant influence of the Company.
[8] The number of shares owned has changed due to the stock merge (10:1) during the year ended December 31, 2018.