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STOCKHOLDERS' EQUITY, Restricted Stock and Stock Options (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 05, 2021
shares
May 06, 2021
shares
Aug. 07, 2020
Director
shares
Jun. 16, 2020
shares
Feb. 20, 2020
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Shares [Abstract]                    
Outstanding, beginning balance (in shares)               81,000    
Granted (in shares)               0    
Vested (in shares)               0    
Canceled (in shares)               0    
Outstanding, ending balance (in shares)           81,000   81,000   81,000
Vested (in shares)           81,000   81,000    
Exercisable, ending balance (in shares)           81,000   81,000    
Weighted Average Exercise Price Per Share [Abstract]                    
Outstanding, beginning balance (in dollars per share) | $ / shares               $ 7.79    
Granted (in dollars per share) | $ / shares               0    
Vested (in dollars per share) | $ / shares               0    
Canceled (in dollars per share) | $ / shares               0    
Outstanding, ending balance (in dollars per share) | $ / shares           $ 7.79   7.79   $ 7.79
Vested or expected to vest (in dollars per share) | $ / shares           7.79   7.79    
Exercisable, ending balance (in dollars per share) | $ / shares           $ 7.79   $ 7.79    
Weighted Average Remaining Contractual Term [Abstract]                    
Outstanding               5 months 1 day   1 year 2 months 1 day
Vested or expected to vest               5 months 1 day    
Exercisable               5 months 1 day    
Aggregate Intrinsic Value [Abstract]                    
Outstanding, beginning balance | $               $ 0    
Granted | $               0    
Canceled | $               0    
Vested | $               0    
Outstanding, ending balance | $           $ 0   0   $ 0
Vested or expected to vest | $           0   0    
Exercisable, ending balance | $           $ 0   $ 0    
Restricted Stock [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Restricted shares granted to each director (in shares)     17,096              
Shares [Abstract]                    
Nonvested restricted stock outstanding, beginning balance (in shares)               1,572,159    
Granted (in shares)               657,076    
Canceled (in shares)               0    
Vested (in shares)               (498,936)    
Nonvested restricted stock outstanding, ending balance (in shares)           1,730,299   1,730,299   1,572,159
Weighted Average Grant Date Fair Value [Abstract]                    
Nonvested restricted stock outstanding, beginning balance (in dollars per share) | $ / shares               $ 2.77    
Granted (in dollars per share) | $ / shares               5.97    
Canceled (in dollars per share) | $ / shares               0    
Vested (in dollars per share) | $ / shares               3.04    
Nonvested restricted stock outstanding, ending balance (in dollars per share) | $ / shares           $ 3.87   $ 3.87   $ 2.77
Recognized restricted stock expense | $           $ 800 $ 700 $ 2,100 $ 1,300  
Unrecognized restricted stock expense | $           6,700   6,700   $ 3,200
Stock Options [Member]                    
Aggregate Intrinsic Value [Abstract]                    
Unrecognized pre-tax compensation expense | $           0   $ 0    
2020 Plan [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Number of shares available for issuance under incentive plan (in shares)       2,000,000            
2020 Plan [Member] | June 16, 2020 [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Stock option award issuance, plan duration               10 years    
2020 Plan [Member] | February 25, 2021 [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Performance-based restricted stock compensation expense | $           300   $ 700    
2020 Plan [Member] | February 20, 2020 [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Performance-based restricted stock compensation expense | $           200 200 $ 600 400  
2020 Plan [Member] | First Anniversary Date [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Percentage of vesting of performance-based shares         20.00%          
2020 Plan [Member] | Second Anniversary Date [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Percentage of vesting of performance-based shares         30.00%          
2020 Plan [Member] | Third Anniversary Date [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Percentage of vesting of performance-based shares         50.00%          
Prior Plan [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Number of shares available for issuance under incentive plan (in shares)       2,000,000            
Prior Plan [Member] | February 28, 2019 [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Vesting period of performance-based shares               3 years    
Prior Plan [Member] | Restricted Stock [Member]                    
Weighted Average Grant Date Fair Value [Abstract]                    
Outstanding restricted shares, intrinsic value | $           11,600   $ 11,600    
Prior Plan [Member] | Restricted Stock [Member] | February 28, 2019 [Member]                    
Weighted Average Grant Date Fair Value [Abstract]                    
Recognized restricted stock expense | $           $ 100 $ 100 $ 400 $ 400  
Non Employee Directors Plan [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Number of directors appointed | Director     2              
Net share settlement for restricted stock (in shares)           0 16,664 154,973 75,115  
Decrease in equity due to payment of tax for employee | $           $ 0 $ 100 $ 1,000 $ 200  
Non Employee Directors Plan [Member] | Restricted Stock [Member]                    
Stockholders' Equity Note Details [Abstract]                    
Number of shares issued under incentive plan (in shares) 6,267 76,195   111,376            
Shares [Abstract]                    
Vested (in shares)     (12,762)