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COMMON STOCK OPTIONS AND WARRANTS (Schedule of activity of warrants) (Details) - USD ($) | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Number of Warrants |  |  |  |
Outstanding at beginning of period | 163,010 | 160,152 |  |
Warrants expired, forfeited, cancelled or exercised | (102,800) |  |  |
Outstanding at end of period | 311,898 | 163,010 | 160,152 |
Exercisable at end of period | 162,474 | 145,857 |  |
Weighted Average Exercise Price |  |  |  |
Outstanding at beginning of period | $ 14.00 | $ 14.00 |  |
Outstanding at end of period | 5.46 | 14.00 | $ 14.00 |
Exercisable at end of period | $ 6.08 | $ 14.00 |  |
Remaining Average Remaining Contractual Term (Years) |  |  |  |
Outstanding at end of period | 4 years 8 months 12 days | 3 years 4 months 24 days |  |
Exercisable at end of period | 4 years 8 months 12 days | 3 years 4 months 24 days |  |
Warrant [Member] |  |  |  |
Number of Warrants |  |  |  |
Outstanding at beginning of period | 1,521,250 | 1,815,181 | 1,801,166 |
Warrants expired, forfeited, cancelled or exercised |  | (338,575) | (21,429) |
Warrants issued |  | 44,644 | 35,444 |
Outstanding at end of period |  | 1,521,250 | 1,815,181 |
Exercisable at end of period |  | 1,521,250 |  |
Weighted Average Exercise Price |  |  |  |
Outstanding at beginning of period | $ 8.78 | $ 9.52 | $ 9.10 |
Warrants issued |  | 7.70 | 9.10 |
Outstanding at end of period |  | 8.78 | $ 9.52 |
Exercisable at end of period |  | $ 8.78 |  |
Remaining Average Remaining Contractual Term (Years) |  |  |  |
Outstanding at the beginning of the year |  |  | 4 years 10 months 25 days |
Warrant issued |  | 4 years 10 months 25 days | 4 years 10 months 25 days |
Outstanding at end of period |  | 3 years 10 months 25 days | 3 years 10 months 25 days |
Exercisable at end of period |  | 2 years 9 months 18 days |  |
Aggregate Intrinsic Value |  |  |  |
Outstanding |  |  |  |
Exercisable |  |  |  |

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- Definition Warrant issued. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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