15. BUSINESS SEGMENTS (Details 2) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 5,359,483	$ 6,009,409	$ 5,917,153	$ 6,047,979
Shandong Morui Chemical Company Limited
Revenues	$ 1,130,000	$ 1,432,000	$ 1,200,000	$ 1,432,000
Percentage of total revenue (%)	21.10%	23.90%	20.30%	23.90%
Shandong Morui Chemical Company Limited | Bromine Segment
Revenues	$ 809,000	$ 1,360,000	$ 879,000	$ 1,360,000
Shandong Morui Chemical Company Limited | Crude Salt Segment
Revenues	321,000	72,000	321,000	72,000
Shandong Morui Chemical Company Limited | Chemical Products Segment
Revenues	0	0	0	0
Shandong Brother Technology Limited
Revenues	$ 850,000	$ 1,141,000	$ 909,000	$ 1,141,000
Percentage of total revenue (%)	15.80%	19.00%	15.40%	19.00%
Shandong Brother Technology Limited | Bromine Segment
Revenues	$ 550,000	$ 1,039,000	$ 609,000	$ 1,039,000
Shandong Brother Technology Limited | Crude Salt Segment
Revenues	300,000	102,000	300,000	102,000
Shandong Brother Technology Limited | Chemical Products Segment
Revenues	0	0	0	0
Shouguang Weidong Chemical Company Limited
Revenues	$ 1,233,000	$ 1,170,000	$ 1,298,000	$ 1,170,000
Percentage of total revenue (%)	23.00%	19.50%	21.90%	19.50%
Shouguang Weidong Chemical Company Limited | Bromine Segment
Revenues	$ 982,000	$ 1,100,000	$ 1,047,000	$ 1,100,000
Shouguang Weidong Chemical Company Limited | Crude Salt Segment
Revenues	251,000	70,000	251,000	70,000
Shouguang Weidong Chemical Company Limited | Chemical Products Segment
Revenues	0	0	0	0
Dongying Bomeite Chemical Company Limited
Revenues	$ 537,000		$ 607,000
Percentage of total revenue (%)	10.00%		10.30%
Dongying Bomeite Chemical Company Limited | Bromine Segment
Revenues	$ 537,000		$ 607,000
Dongying Bomeite Chemical Company Limited | Crude Salt Segment
Revenues	0		0
Dongying Bomeite Chemical Company Limited | Chemical Products Segment
Revenues	0		0
Shandong Shouguang Shenrunfa Ocean Chemical Company
Revenues	$ 711,000	$ 772,000	$ 768,000	$ 772,000
Percentage of total revenue (%)	13.30%	12.90%	13.00%	12.90%
Shandong Shouguang Shenrunfa Ocean Chemical Company | Bromine Segment
Revenues	$ 711,000	$ 772,000	$ 768,000	$ 772,000
Shandong Shouguang Shenrunfa Ocean Chemical Company | Crude Salt Segment
Revenues	0	0	0	0
Shandong Shouguang Shenrunfa Ocean Chemical Company | Chemical Products Segment
Revenues	$ 0	$ 0	$ 0	$ 0