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9. STOCKHOLDERS' EQUITY (Tables) - Options | 12 Months Ended
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Dec. 31, 2019
Summary of stock options outstanding |
| December 31, 2019 | December 31, 2018
| Number of Options | Weighted Average Exercise Price | Number of Options | Weighted Average Exercise Price
Outstanding, beginning of period | 320,000 | $0.52 | 200,000 | $0.76
Granted | 300,000 | 0.11 | 120,000 | 0.12
Exercised | — | — | — | —
Outstanding, end of period | 620,000 | $0.32 | 320,000 | $0.52
Options outstanding and exercisable by price range |
Outstanding Options | Average Weighted | Exercisable Options
Range | Number | Remaining Contractual Life in Years | Number | Weighted Average Exercise Price
$0.05 | 20,000 | 1.03 | 20,000 | $0.05
$0.10 | 70,000 | 5.22 | 70,000 | $0.10
$0.11 | 250,000 | 4.01 | 250,000 | $0.11
$0.12 | 100,000 | 3.03 | 100,000 | $0.12
$0.27 | 40,000 | 5.01 | 40,000 | $0.27
$0.55 | 100,000 | 6.10 | 100,000 | $0.55
$2.10 | 40,000 | 0.01 | 40,000 | $2.10
| 620,000 | 4.04 | 620,000 | $0.32
Summary of outstanding common stock warrants |
| December 31, 2019 | December 31, 2018
| Number of Warrants | Weighted Average Exercise Price | Number of Warrants | Weighted Average Exercise Price
Outstanding, beginning of period | 26,550,611 | $0.34 | 35,501,411 | $0.33
Granted | 1,300,000 | 0.11 | 250,000 | 0.08
Exercised | - | - | - | -
Expired | (10,610,088) | (0.23) | (9,200,800) | (0.30)
Outstanding, end of period | 17,240,523 | $0.39 | 26,550,611 | $0.34
Warrants outstanding and exercisable by price range |
Outstanding Warrants |  | Exercisable Warrants
Exercise Price | Number | Average Weighted Remaining Contractual Life in Years | Number | Weighted Average Exercise Price
$0.08 | 250,000 | 3.90 | 250,000 | $0.08
$0.10 | 1,265,000 | 3.76 | 1,265,000 | $0.10
$0.12 | 3,750,000 | 2.92 | 3,750,000 | $0.12
$0.14 | 50,000 | 4.30 | 50,000 | $0.14
$0.17 | 10,000 | 2.82 | 10,000 | $0.17
$0.27 | 250,000 | 2.00 | 250,000 | $0.27
$0.29 | 4,615,525 | 2.16 | 4,615,525 | $0.29
$0.30 | 2,200,000 | 0.67 | 2,200,000 | $0.30
$0.32 | 250,000 | 1.75 | 250,000 | $0.32
$0.42 | 250,000 | 1.50 | 250,000 | $0.42
$0.50 | 250,000 | 1.25 | 250,000 | $0.50
$0.55 | 100,000 | 1.08 | 100,000 | $0.55
$0.69 | 999,998 | 0.22 | 999,998 | $0.69
$1.00 | 3,000,000 | 0.34 | 3,000,000 | $1.00
| 17,240,523 | 1.81 | 17,240,523 | $0.39

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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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