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STOCKHOLDERS' EQUITY (Detail Textuals 1) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2018
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares granted   0   1,632,000  
Exercise price   $ 0   $ 7.80  
Weighted average grant-date fair value       $ 7.71  
Stock-based compensation   $ 974,699 $ 2,461,429   $ 199,556
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares granted 108,000     1,632,000  
Exercise price $ 7.80     $ 6.37  
Vesting terms 36 months        
Fair value of these stock options granted $ 2,743,894        
Stock options terms 10 years        
Stock Options Expected To Vest Monthly Per Grant 3,000        
Weighted average grant-date fair value $ 6.37     $ 7.71  
Stock-based compensation   974,699 $ 2,461,429 $ 5,375,359  
Total unrecognized compensation cost related to non-vested stock   $ 4,067,375   $ 5,042,075  
Unrecognized compensation weighted-average period related to non-vested stock   1 year 3 months 22 days   1 year 6 months 4 days  
CEO and CFO | Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares granted       400,000  
Exercise price       $ 7.80  
Options Vested Date       Jan. 01, 2018  
Vesting terms       24 months  
Vesting ratio       One-third  
Fair value of these stock options granted       $ 5,115,693  
Board | Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares granted       400,000  
Exercise price       $ 7.80  
Vesting terms       24 months  
Fair value of these stock options granted       $ 2,557,847