Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - 2015 Stock Plan (Details)

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SHARE-BASED COMPENSATION - 2015 Stock Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 21, 2022
Jun. 20, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2015
SHARE BASED COMPENSATION              
Share based compensation expense     $ 873 $ 774 $ 1,519 $ 1,547  
Stock Plan 2015              
SHARE BASED COMPENSATION              
Number of shares authorized for grant             4,642,857
Increase in number of shares authorized for grant 7,642,857 3,000,000          
Number of shares available for issuance     1,322,932   1,322,932    
2023 Employee Stock Purchase Plan              
SHARE BASED COMPENSATION              
Shares of common stock reserved for future issuance under the plan     300,000   300,000    
Share based compensation expense         $ 0