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CONVERTIBLE NOTES (Tables)
 6 Months Ended
Jun. 30, 2023
Debt Disclosure [Abstract]  
Convertible Debt
As of June 30, 2023 and December 31, 2022, the outstanding convertible senior notes net of debt discount and issue costs are summarized as follows:
June 30, 2023December 31, 2022
Principal AmountDebt DiscountCarrying AmountPrincipal AmountDebt DiscountCarrying Amount
Convertible senior notes$38,750 $(5,356)$33,394 $38,750 $(6,860)$31,890 
Less: Current portion— — — — — — 
Long-term portion$38,750 $(5,356)$33,394 $38,750 $(6,860)$31,890 
Interest Income and Interest Expense Disclosure nterest expense recognized with respect to the Notes for the three and six months ended June 30, 2023 and 2022 was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
Contractual interest expense$657 $657 $1,314 $1,313 
Amortization of debt discount765 644 1,498 1,262 
Total interest expense$1,422 $1,301 $2,812 $2,575