Annual report pursuant to Section 13 and 15(d)

STOCK OPTIONS - Summary of Stock Option Activity (Details)

v3.20.1
STOCK OPTIONS - Summary of Stock Option Activity (Details) - Common Stock - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning Balance, number of shares 3,496,250  
Options Issued, number of shares 520,000  
Options Exercised, number of shares (737,916)  
Options Forfeited, number of shares (103,334)  
Ending Balance, number of shares 3,175,000 3,496,250
Ending Balance, Options Exercisable 2,121,667  
Beginning Balance, Weighted-average exercise price $ 0.66  
Options Issued, Weighted-average exercise price 1.84  
Options Exercised, Weighted-average exercise price 0.37  
Options Forfeited, Weighted-average exercise price 0.94  
Ending Balance, Weighted-average exercise price 0.92 $ 0.66
Ending Balance, Options Exercisable, Weighted-average exercise price $ 0.66  
Options Outstanding, Aggregate intrinsic value $ 2,692,025 $ 2,608,329
Options Exercisable, Aggregate intrinsic value $ 2,334,292  
Weighted-average remaining contractual term (years) 2 years 9 months 14 days 3 years 14 days
Weighted-average remaining contractual term (years), Exercisable 2 years 2 months 19 days