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REVENUE RECOGNITION (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
REVENUE RECOGNITION.        
Gross product revenue $ 700 $ 1,733 $ 4,119 $ 2,639
Chargebacks and administrative fees (122) (120) (372) (195)
Trade discounts and allowances 31 (59) (189) (94)
Government rebates and co-payment assistance (53) (39) (282) (76)
Sales returns and allowances   (8) (742) (12)
Total gross-to-net adjustments (144) (226) (1,585) (377)
Net product revenue 556 $ 1,507 2,534 $ 2,262
Estimated amount of gross net accruals $ 900   $ 900