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15. BUSINESS SEGMENTS (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Shandong Morui Chemical Company Limited |  |
Revenue from major customer | $ 5,963 | $ 2,378
Percentage of total revenue (%) | 21.20% | 22.60%
Shandong Morui Chemical Company Limited | Bromine Segment |  |
Revenue from major customer | $ 4,901 | $ 2,203
Shandong Morui Chemical Company Limited | Crude Salt Segment |  |
Revenue from major customer | 1,062 | 175
Shandong Morui Chemical Company Limited | Chemical Products Segment |  |
Revenue from major customer | 0 | 0
Shouguang Weidong Chemical Company Limited |  |
Revenue from major customer | $ 4,271 | $ 1,783
Percentage of total revenue (%) | 15.20% | 16.90%
Shouguang Weidong Chemical Company Limited | Bromine Segment |  |
Revenue from major customer | $ 3,188 | $ 1,629
Shouguang Weidong Chemical Company Limited | Crude Salt Segment |  |
Revenue from major customer | 1,083 | 154
Shouguang Weidong Chemical Company Limited | Chemical Products Segment |  |
Revenue from major customer | 0 | 0
Shandong Brother Technology Limited, Kuerle Xingdong Trading Limited |  |
Revenue from major customer | $ 4,559 | $ 1,732
Percentage of total revenue (%) | 16.20% | 16.40%
Shandong Brother Technology Limited, Kuerle Xingdong Trading Limited | Bromine Segment |  |
Revenue from major customer | $ 3,683 | $ 1,539
Shandong Brother Technology Limited, Kuerle Xingdong Trading Limited | Crude Salt Segment |  |
Revenue from major customer | 876 | 192
Shandong Brother Technology Limited, Kuerle Xingdong Trading Limited | Chemical Products Segment |  |
Revenue from major customer | 0 | 0
Dongying Bomeite Chemical Company Limited |  |
Revenue from major customer | $ 2,970 | $ 1,098
Percentage of total revenue (%) | 10.50% | 10.40%
Dongying Bomeite Chemical Company Limited | Bromine Segment |  |
Revenue from major customer | $ 2,970 | $ 1,098
Dongying Bomeite Chemical Company Limited | Crude Salt Segment |  |
Revenue from major customer | 0 | 0
Dongying Bomeite Chemical Company Limited | Chemical Products Segment |  |
Revenue from major customer | 0 | 0
Shandong Shouguang Shenrunfa Ocean Chemical Company Limited |  |
Revenue from major customer | $ 3,320 | $ 1,297
Percentage of total revenue (%) | 11.80% | 12.30%
Shandong Shouguang Shenrunfa Ocean Chemical Company Limited | Bromine Segment |  |
Revenue from major customer | $ 3,320 | $ 1,297
Shandong Shouguang Shenrunfa Ocean Chemical Company Limited | Crude Salt Segment |  |
Revenue from major customer | 0 | 0
Shandong Shouguang Shenrunfa Ocean Chemical Company Limited | Chemical Products Segment |  |
Revenue from major customer | $ 0 | $ 0

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