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STOCKHOLDERS' EQUITY: - Employee Stock Purchase Plan (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 9 Months Ended
Nov. 30, 2018
$ / shares
Nov. 30, 2018
$ / shares
Jan. 31, 2015
$ / shares
Jan. 31, 2015
$ / shares
Sep. 30, 2022
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Employee Stock Purchase 2015 Plan            
Information related to compensation cost            
Purchase price for initial subscription (in dollars per share) | (per share)     $ 38.44 $ 2.63    
Percentage of title acquired by employee in every two years on shares paid in previous two years         50.00%  
Period of plan         8 years  
Ratio of bonus shares granted to participant         0.1  
Stock based compensation expense | $         $ 0.5 $ 0.5
Unrecognized compensation expense | $         $ 0.5 $ 1.0
Stock award activity, Shares            
Outstanding shares at the beginning of the period | shares         867,234 1,264,410
Exercised (in shares) | shares         (21,339) (381,288)
Outstanding shares at the end of the period | shares         845,895 883,122
Unit Weighted Average Grant Date Fair Value            
Outstanding shares at the beginning of the period (in dollars per share) | $ / shares         $ 2.63 $ 2.63
Exercised (in dollars per share) | $ / shares         2.63 2.63
Outstanding shares at the end of the period (in dollars per share) | $ / shares         $ 2.63 $ 2.63
Employee Stock Purchase 2018 Plan            
Information related to compensation cost            
Purchase price for initial subscription (in dollars per share) | (per share) $ 37.89 $ 1.86        
Percentage of title acquired by employee in every two years on shares paid in previous two years         50.00%  
Period of plan         8 years  
Ratio of bonus shares granted to participant         0.1  
Stock based compensation expense | $         $ 0.5 $ 0.5
Unrecognized compensation expense | $         $ 2.6 $ 3.3
Stock award activity, Shares            
Outstanding shares at the beginning of the period | shares         3,173,924 3,918,458
Exercised (in shares) | shares         (312,907) (716,449)
Outstanding shares at the end of the period | shares         2,861,017 3,202,009
Unit Weighted Average Grant Date Fair Value            
Outstanding shares at the beginning of the period (in dollars per share) | $ / shares         $ 1.86 $ 1.86
Exercised (in dollars per share) | $ / shares         1.86 1.86
Outstanding shares at the end of the period (in dollars per share) | $ / shares         $ 1.86 $ 1.86