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PREPAID EXPENSES AND OTHER CURRENT ASSETS | 12 Months Ended
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Dec. 31, 2022
PREPAID EXPENSES AND OTHER CURRENT ASSETS |
PREPAID EXPENSES AND OTHER CURRENT ASSETS | 8. PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Years Ended December 31,
​ |  | 2022 |  | 2021
Prepaid regulatory fees | ​ | $ | 5,614 | ​ | $ | 3,602
Prepaid income taxes | ​ | ​ | 5,138 | ​ | ​ | —
Prepaid co-pay program incentives | ​ | ​ | 1,907 | ​ | ​ | —
Prepaid insurance | ​ | ​ | 960 | ​ | ​ | 864
Other current assets |  | ​ | 57 | ​ |  | 27
Other prepaid expenses | ​ |  | 3,005 | ​ |  | 1,386
Prepaid expenses and other current assets | ​ | $ | 16,681 | ​ | $ | 5,879
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