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STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 03, 2020 | Feb. 12, 2020 | Aug. 15, 2019 | Feb. 20, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued |  |  |  |  |  | 1,542,188 | 1,542,188 |  |
Common stock par value |  |  |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001
Common stock issued, Value |  |  |  |  |  | $ 9,253,128 | $ 9,250,000 |  |
Total compensation cost for stock options not yet recognized |  |  |  |  | $ 282,142 |  | $ 282,142 |  |
Total compensation cost for stock options not yet recognized, period |  |  |  |  |  |  | 1 year |  |
Stock option granted |  |  |  |  |  |  | 310,290 |  | 8,572
Exercise price of stock option |  |  |  |  |  |  | $ 5.39 |  | $ 14.00
Options forfeited |  |  |  |  |  |  | 161,402 |  | 14,286
Stock options cancelled and replaced to employees |  |  |  |  |  |  | 102,800 |  |
Strike price of the cancelled options |  |  |  |  |  |  | $ 14.00 |  |
Warrant [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Public offering price |  |  |  |  | $ 6.00 |  | $ 6.00 |  |
Percentage of strike price |  |  |  |  | 150.00% |  | 150.00% |  |
Strike price |  |  |  |  | $ 9.00 |  | $ 9.00 |  |
Shareholder [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Maximum number of shares was increased |  |  |  |  |  |  | 321,429 |  |
2016 Plan [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares available for grant |  |  |  |  | 178,572 |  | 178,572 |  |
Employees and directors [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | $ 199,070 | $ 28,133 |
Board of Directors [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Total compensation cost for stock options not yet recognized, period |  |  |  |  | 1 year 9 months |  |  |  |
Strike price | $ 4.74 |  |  |  |  |  |  |  |
Stock option granted | 310,290 |  | 8,572 |  | 310,290 |  | 8,572 |  |
Exercise price of stock option | $ 6.00 |  | $ 14.00 |  |  |  | $ 14.00 |  |
Exercise Amount | $ 149,424 |  |  |  |  |  |  |  |
Options forfeited | 161,402 |  |  |  | 161,402 |  |  |  |
Stock option plan expense |  |  |  |  | $ 88,170 |  | $ 370,312 |  |
Board of Directors [Member] | Before Reclassification [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock option granted | 160,866 |  |  |  |  |  |  |  |
Options forfeited | 536 |  |  |  |  |  |  |  |
Board of Directors [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Exercise price of stock option |  |  |  |  | $ 4.74 |  |  |  |
Vesting Period | 9 months |  |  |  |  |  |  |  |
Board of Directors [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Exercise price of stock option |  |  |  |  | 6.00 |  |  |  |
Vesting Period | 21 months |  |  |  |  |  |  |  |
President and Chief Operating Officer [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Options forfeited |  |  |  |  |  |  |  | 14,286 |
Employee stock options [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Strike price |  |  |  |  | 4.74 |  | $ 4.74 |  |
Day of issuance |  |  |  |  | $ 4.70 |  | $ 4.70 |  |
Expected term |  |  |  |  |  |  | 2 years 6 months |  |
Expected volatility |  |  |  |  |  |  | 81.00% |  |
Dividend rate |  |  |  |  |  |  | 0.255% |  |
ThinkEquity [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued |  | 1,350,000 |  |  |  |  |  |  |
Common stock par value |  | $ 0.001 |  |  |  |  |  |  |
Public offering price |  | $ 6.00 |  |  |  |  |  |  |
ThinkEquity [Member] | Over-Allotment Option [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued |  | 202,500 |  | 192,188 |  |  |  |  |
Common stock par value |  |  |  | $ 6.00 |  |  |  |  |
Closing date of public offering |  | Feb. 18, 2020 |  | Feb. 21, 2020 |  |  |  |  |

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