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STOCKHOLDERS' EQUITY (DEFICIT) (Narrative) (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 24, 2017 | Apr. 30, 2020 | Aug. 28, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Jun. 30, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Apr. 23, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock authorized |  |  |  |  |  |  |  | 10,000,000 | 10,000,000 |  |  | 10,000,000 | 10,000,000 |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  |  |  |  | $ 9,253,128 |  |  |  |  |
Shares available for grant |  |  |  |  |  |  |  |  | 321,429 |  |  | 321,429 |  |  |  |  |
Common stock issued for services |  |  |  |  |  |  |  |  |  |  |  | $ 52,500 | $ 32,917 |  |  |  |
Treasury stock |  |  |  |  |  |  |  | $ 157,452 | $ 157,452 |  |  | $ 157,452 | $ 157,452 |  |  |  | $ 148,000
Treasury stock shares |  |  |  |  |  |  |  | 1,324 | 1,324 |  |  | 1,324 | 1,324 |  |  |  | 235
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,993 |  |  |  |
Proceeds from warrants exercise |  |  |  |  |  |  |  |  |  |  |  |  | 2,318,020 |  |  |  |
Total compensation cost for stock options not yet recognized |  |  |  |  |  |  |  |  | $ 264,256 |  |  | 264,256 |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  |  |  |  | $ 1,542 |  |  |  |  |
Issuance of common stock, shares |  |  |  |  |  |  |  |  |  |  |  | 1,542,188 |  |  |  |  |
Conversion of preferred stock |  |  |  |  |  |  |  | $ 375,000 |  |  | $ 750,000 |  |  |  |  |  |
Common stock issued for services |  |  |  |  |  |  |  |  |  |  |  | $ 12 | $ 4 |  |  |  |
Common stock issued for services, shares |  |  |  |  |  |  |  |  |  |  |  | 11,112 | 4,523 |  |  |  |
Conversion of stock shares converted |  |  |  |  |  |  |  | 53,571 |  |  | 107,142 |  |  |  |  |  |
Conversion of stock converted value |  |  |  |  |  |  |  | $ 375,000 |  |  | $ 750,000 |  |  |  |  |  |
Shareholder [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price |  |  |  | $ 9.10 |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase shares of common stock |  |  |  | 214,286 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from warrants exercise |  |  |  |  |  |  |  |  |  |  |  | $ 1,650,000 |  |  |  |  |
Reduced exercise price |  |  |  | $ 7.70 |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholder [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market value of stock repurchased |  |  |  |  |  |  |  |  |  |  |  |  | $ 10.08 | $ 7.00 |  |  |
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  |  | $ 115 | $ 84 |  |  |
Shareholder [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market value of stock repurchased |  |  |  |  |  |  |  |  |  |  |  |  | $ 9.09 | $ 6.30 |  |  |
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  |  | $ 753 | $ 140 |  |  |
Series B Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock authorized |  |  |  |  |  |  |  |  | 10,000,000 |  |  | 10,000,000 |  |  |  |  |
Preferred stock, shares issued |  |  |  |  |  |  |  |  | 15,000 |  |  | 15,000 |  |  |  |  |
Conversion price |  |  |  |  |  |  |  |  | $ 7.00 |  |  | $ 7.00 |  |  |  |  |
Conversion of preferred stock |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |
Conversion of stock converted value |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |
Series B Convertible Preferred Stock [Member] | SPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued | 2,830 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock | $ 2,830,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock converted value | $ 2,830,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock authorized |  |  |  |  |  |  |  | 15,000 | 15,000 |  |  | 15,000 | 15,000 |  |  |  |
Preferred stock, shares issued | 1,705 |  |  |  |  |  |  | 1,705 | 1,705 |  |  | 1,705 | 1,705 |  |  |  |
Preferred stock, shares outstanding | 1,705 |  |  |  |  |  |  | 1,705 | 1,705 |  |  | 1,705 | 1,705 |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares |  |  |  |  |  |  |  |  |  | 9,878 |  |  |  |  |  |  |
Number of options issued |  |  |  |  | 67,500 |  |  |  |  |  |  |  |  |  |  |  |
Number of options expired |  |  |  |  | 1,197 |  |  |  |  |  |  |  |  |  |  |  |
Number of forfeited options |  |  |  |  | 9,450 |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase shares of common stock |  |  |  | 214,286 |  |  |  | 357 |  | 66,756 | 19,643 |  | 357 |  |  |  |
Proceeds from warrants exercise |  |  |  | $ 1,650,000 |  |  |  |  |  | $ 514,020 | $ 151,250 |  | $ 2,750 |  |  |  |
Common stock issued for cashless exercise |  |  |  |  |  |  |  |  |  | 46,571 |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock shares converted |  |  |  |  |  |  |  | 375 |  |  | 750 |  |  |  |  |  |
Employee Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock on the date of grant, term of the stock option |  |  |  |  |  |  |  |  |  |  |  | not exceed 10 years |  |  |  |  |
Voting rights |  |  |  |  |  |  |  |  |  |  |  | more than 10% of the total combined voting power of all classes of capital stock |  |  |  |  |
Aggregate fair market value of common stock |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |
Employees and Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  | $ 454,770 | 44,874 |  |  |  |
Board of Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued for services |  |  | $ 19,167 |  | $ 37,500 | $ 7,500 | $ 7,500 |  |  |  |  |  | $ 13,750 |  |  |  |
Common stock issued for services, shares |  |  | 2,484 |  | 7,869 | 1,632 | 1,611 |  |  |  |  |  | 2,039 |  |  |  |
Key staff members, officers and directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercise price |  | $ 14.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options issued |  | 160,866 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Key staff members, officers and directors [Member] | Transaction One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercise price |  | $ 4.74 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options issued |  | 149,424 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forfeited options |  | 536 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Key staff members, officers and directors [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercise price |  | $ 6.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New CEO and two key staff members [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options issued |  |  |  |  |  |  |  |  | 140,000 |  |  |  |  |  |  |  |
New CEO and two key staff members [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercise price |  |  |  |  |  |  |  |  | $ 4.18 |  |  | $ 4.18 |  |  |  |  |
New CEO and two key staff members [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercise price |  |  |  |  |  |  |  |  | $ 4.35 |  |  | $ 4.35 |  |  |  |  |
Two Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options issued |  |  |  |  |  |  |  |  |  |  |  |  | 17,144 |  |  |  |
Board and Former Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of forfeited options |  |  |  |  |  |  |  |  |  |  |  |  | 14,286 |  |  |  |
2016 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of Common stock under Awards |  |  |  |  |  |  |  |  |  |  |  | 16,327 |  |  |  |  |
Shares available for grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 178,572 |
2016 Equity Incentive Plan [Member] | Employees and Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares available for grant |  |  |  |  |  |  |  |  | 451,898 |  |  | 451,898 |  |  | 160,152 |  |

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