7. STOCKHOLDERS' EQUITY (Details) - shares	Dec. 31, 2019	Dec. 31, 2018
0.70
Outstanding warrants and stock options	420,000	420,000
0.77
Outstanding warrants and stock options		100,000
0.80
Outstanding warrants and stock options	1,666,667
1.00
Outstanding warrants and stock options		25,116
1.03
Outstanding warrants and stock options	120,000	120,000
1.08
Outstanding warrants and stock options		37,500
1.14
Outstanding warrants and stock options	600,000	600,000
1.21
Outstanding warrants and stock options	120,000	120,000
1.35
Outstanding warrants and stock options	365,455
1.40
Outstanding warrants and stock options	321,737	1,121,736
1.50
Outstanding warrants and stock options		100,000
1.63
Outstanding warrants and stock options	100,000
1.64
Outstanding warrants and stock options	200,000	200,000
1.80
Outstanding warrants and stock options	1,250,000	1,250,000
2.00
Outstanding warrants and stock options	200,000	400,000
2.23
Outstanding warrants and stock options	339,901	832,512
Total
Outstanding warrants and stock options	570,360	6,799,655
Total | Expiring in the year 2020
Outstanding warrants and stock options	2,331,638	3,624,248
Total | Expiring in the year 2021
Outstanding warrants and stock options	520,000	820,000
Total | Expiring in the year 2022
Outstanding warrants and stock options	365,455
Total | Expiring in the year 2023
Outstanding warrants and stock options	720,000	720,000
Total | Expiring in the year 2024
Outstanding warrants and stock options	100,000
Total | Expiring in the year 2025
Outstanding warrants and stock options	1,666,667
Total | Expiring in the year 2019
Outstanding warrants and stock options		1,635,407
2.50
Outstanding warrants and stock options		35,211
3.50
Outstanding warrants and stock options		15,000
4.50
Outstanding warrants and stock options		700,000
6.00
Outstanding warrants and stock options		22,580
7.00
Outstanding warrants and stock options		700,000