General form of registration statement for all companies including face-amount certificate companies

STOCK-BASED COMPENSATION - Additional Information (Details)

v3.20.4
STOCK-BASED COMPENSATION - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 14, 2020
Sep. 05, 2018
Sep. 05, 2018
Jul. 19, 2018
Feb. 03, 2017
Jun. 18, 2013
Jul. 19, 2018
Jun. 18, 2013
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Oct. 01, 2020
Jul. 01, 2020
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate, minimum                 79.44%   79.44%        
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate, maximum                 119.44%   119.44%        
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate, minimum                 0.13%   0.13%        
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate, maximum                 2.85%   3.23%        
Share based compensation arrangement by share based payment award fair value assumptions expected forfeiture rate                 0.00%   0.00%        
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate                 0.00%   0.00%        
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term                 5 years 7 months 6 days   5 years 7 months 6 days        
Common Stock, Shares Authorized                 800,000,000   800,000,000 300,000,000   800,000,000 300,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 975,000   3,375,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares                 16,587,085   16,077,006        
Proceeds from Stock Options Exercised                     $ 0 $ 32,400      
Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage                     100.00%        
Non-Employee Restricted Shares [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                 $ 0 $ 40,000 $ 220,000 397,000      
Research and Development Expense [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                 26,000 76,000 288,000 483,000      
General and Administrative Expense [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                 $ 60,000 83,000 390,000 347,000      
General and Administrative Expense [Member] | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                     $ 0 0      
Employees And Directors [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 19,179,212   19,179,212        
Consultants [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 8,692,500   7,717,500        
Consultants [Member] | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted   100,000 100,000                        
Employees, Directors And Consultants [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                 $ 86,000 $ 159,000 $ 678,000 $ 830,000      
2013 Stock Incentive Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Increase In Aggregate Number Of Shares                         3,000,000    
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition                 1 year 4 months 28 days   1 year 9 months 18 days        
Common Stock, Shares Authorized                     28,114,256   31,114,256    
Share-based compensation arrangement by share-based payment award, number of additional shares authorized           3,000,000   3,000,000              
Stock Issued During Period, Shares, New Issues                     477,269        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 0 0 0 87,567      
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period                     1,437,433        
Proceeds from Stock Options Exercised                       $ 32,400      
2013 Stock Incentive Plan | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, award vesting period     90 days                        
2013 Stock Incentive Plan | Restricted Stock [Member] | Share-based Compensation Award, Tranche One [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, award vesting period   90 days                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares     50,000                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 100.00% 100.00% 100.00% 100.00% 100.00%   100.00%                
2013 Stock Incentive Plan | Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, award vesting period   365 days                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares   50,000 50,000                        
Plan 2013 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, number of shares available for grant                 6,873,199   4,750,008        
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, total                     $ 268,000        
Plan 2013 [Member] | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based compensation arrangement by share-based payment award, award vesting period 90 days                            
Plan 2013 [Member] | Employees And Directors [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 0   2,685,000        
Plan 2013 [Member] | Consultants [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 975,000   690,000        
Plan 2013 [Member] | Consultants [Member] | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted 50,000                            
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Other   50,000   220,000     220,000                
Plan 2013 [Member] | Employees, Directors And Consultants [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Allocated share-based compensation expense                 $ 265,000            
Plan 2013 [Member] | Board of Directors And Management [Member] | Restricted Stock [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted       745,000 1,750,000   745,000