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COMMON STOCK OFFERING, RESTRICTED STOCK UNITS, STOCK OPTIONS AND WARRANTS - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
May 31, 2022
May 27, 2022
Feb. 22, 2022
Oct. 29, 2021
Aug. 06, 2021
Mar. 11, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Feb. 27, 2022
Jan. 14, 2022
Dec. 31, 2021
Apr. 12, 2021
Jan. 05, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Value of shares authorized to be repurchased $ 50,000 $ 15,000                 $ 15,000 $ 15,000      
Stock repurchase program, period 4 years 2 years                          
Stock reacquired and retired (shares)             200,000   900,000            
Stock reacquired and retired             $ 1,000   $ 4,700            
Common Stock Offering                              
Underwriter discounts and commissions                 0 $ 2,948          
Underwriter expenses                 0 1,050          
Professional fees             6,145 $ 6,581 $ 12,837 14,130          
Stock Plans                              
Stock available for grant newly authorized by Board of Directors (shares)     3,500,000           3,484,000            
Restricted Stock Units                              
Stock-based compensation expense             $ 2,443 2,393 $ 8,653 7,104          
Stock Options                              
Stock options granted in period (shares)                 1,243,000            
Warrants                              
Warrants outstanding (shares)             18,100,000   18,100,000            
Private Placement                              
Warrants                              
Warrants outstanding (shares)                           6,100,000  
Exercise price of warrants (in USD per share)       $ 1.04                      
Public Warrants                              
Warrants                              
Warrants outstanding (shares)       8,600,000                 8,600,000    
Exercise price of warrants (in USD per share)       $ 1.04                 $ 11.50    
Redeemable warrants to additional paid-in capital       $ 6,300                      
Exercise Price $5.64                              
Warrants                              
Warrants outstanding (shares)             3,400,000   3,400,000            
Exercise price of warrants (in USD per share)             $ 5.64   $ 5.64            
Exercise Price $11.50                              
Warrants                              
Warrants outstanding (shares)             14,700,000   14,700,000            
Exercise price of warrants (in USD per share)             $ 11.50   $ 11.50            
Exercise Price $11.50 | Private Placement                              
Warrants                              
Exercise price of warrants (in USD per share)                           $ 11.50  
Exercise Price $11.50 | Public Warrants                              
Warrants                              
Exercise price of warrants (in USD per share)       $ 11.50                      
RSUs                              
Acquisition of Common Stock Upon Vesting of Restricted Stock Units [Abstract]                              
Stock repurchased (Shares)         100,000                    
Stock reacquired         $ 1,100                    
Stock options                              
Restricted Stock Units                              
Period for recognition of compensation costs not yet recognized related to nonvested awards                 2 years 1 month 6 days            
Stock Options                              
Stock options granted in period (shares)                 1,200,000            
Fair value of stock options granted                 $ 3,300            
Weighted-average grant date fair value per share of options granted in period (usd per share)                 $ 2.64            
Unrecognized compensation costs             $ 4,400   $ 4,400       $ 3,900    
Period for recognition of compensation costs not yet recognized related to nonvested awards                 2 years 1 month 6 days            
2013 Plan | RSUs                              
Restricted Stock Units                              
Restricted stock units granted in period (shares)                 800,000            
Share price of common stock on date of grant of RSUs (USD per share)                 $ 5.10            
Aggregate fair value of shares underlying RSU's                 $ 4,200            
Stock-based compensation expense             1,800 2,100 6,600 6,200          
Compensation costs not yet recognized of nonvested awards             9,100   $ 9,100            
Period for recognition of compensation costs not yet recognized related to nonvested awards                 1 year 10 months 24 days            
Stock Options                              
Period for recognition of compensation costs not yet recognized related to nonvested awards                 1 year 10 months 24 days            
2013 Plan | Stock options                              
Stock Options                              
Award vesting rights (percentage)                 33.33%            
Stock Plans | Stock options                              
Stock Options                              
Term of vested options (years)                 10 years            
Series A Preferred Stock                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Value of shares authorized to be repurchased                             $ 8,950
Common Stock Offering                              
Sale of stock (shares)           60,000                  
Acquisition of Common Stock Upon Vesting of Restricted Stock Units [Abstract]                              
Stock reacquired             $ 0 $ 0 $ 0 $ 38          
March 2021 Offering                              
Common Stock Offering                              
Sale of stock (shares)           7,800,000                  
Price per share (usd per share)           $ 7.75                  
Gross proceeds           $ 57,000                  
Underwriter discounts and commissions           2,900                  
Underwriter expenses           200                  
Professional fees           1,300                  
Consideration received           $ 55,600                  
Maximum | 2013 Plan | RSUs                              
Restricted Stock Units                              
Award vesting period                 36 months            
Minimum | 2013 Plan | RSUs                              
Restricted Stock Units                              
Award vesting period                 12 months