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NOTES PAYABLE (Tables)
12 Months Ended
Dec. 31, 2020
Class of Warrant or Right [Line Items]  
Schedule of notes payable

​

​

​

​

​

​

​

​

​

    

December 31, 

    

December 31, 

​

​

2020

​

2019

2020 10% Notes

​

$

2,600,000

​

$

—

2019 12% Notes

​

​

—

​

​

1,506,000

SBI Note

​

 

—

​

 

750,000

2019 15% Notes

​

​

200,000

​

​

200,000

Related party note payable

​

​

340,000

​

​

100,000

Unamortized debt discount

​

​

(251,456)

​

​

(225,649)

​

​

​

2,888,544

​

​

2,330,351

Less: Current portion

​

​

—

​

​

(2,330,351)

Long-term portion

​

$

2,888,544

​

$

—

Schedule of maturities of long-term debt

​

​

​

​

​

Year ending December 31, 

    

Amount

2021

​

$

—

2022

​

 

200,000

2023

​

 

2,940,000

​

​

$

3,140,000

10% Warrants  
Class of Warrant or Right [Line Items]  
Summary of underlying assumptions used in the binomial lattice model to determine the fair value of Warrants

​

​

​

​

​

Current stock price

    

$

0.53

Exercise price

​

$

0.56

Risk-free interest rate

​

​

0.38 %

Expected dividend yield

​

​

—

Expected term (in years)

​

​

5.0

Expected volatility

​

​

115%

15% Warrants  
Class of Warrant or Right [Line Items]  
Summary of underlying assumptions used in the binomial lattice model to determine the fair value of Warrants

​

​

​

​

​

Current stock price

    

$

0.45 - 0.67

Exercise price

​

$

0.45

Risk-free interest rate

​

​

0.68 - 1.62 %

Expected dividend yield

​

​

—

Expected term (in years)

​

​

0.83 - 3.06

Expected volatility

​

​

112 - 119 %

12% Warrants  
Class of Warrant or Right [Line Items]  
Summary of underlying assumptions used in the binomial lattice model to determine the fair value of Warrants

​

​

​

​

​

​

Current stock price

    

$

0.82 - 0.92

​

Exercise price

​

$

1.30

​

Risk-free interest rate

​

 

1.63 - 1.68

%

Expected dividend yield

​

 

—

​

Expected term (in years)

​

 

1.10

​

Expected volatility

​

 

124

%

8.5% Warrants  
Class of Warrant or Right [Line Items]  
Summary of underlying assumptions used in the binomial lattice model to determine the fair value of Warrants

​

​

​

​

​

​

Current stock price

    

$

4.18

​

Exercise price

​

$

2.35

​

Risk-free interest rate

​

 

2.46

%

Expected dividend yield

​

 

—

​

Expected term (in years)

​

 

2.0

​

Expected volatility

​

 

134

%

Number of iterations

​

 

5

​