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STOCKHOLDERS' EQUITY (Tables)
 6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
Information with respect to the Company’s non-vested time-based restricted stock units for the six months ended June 30, 2023 was as follows:
 Number of Restricted Stock UnitsWeighted-
Average
Grant-Date
Fair Value		Weighted-
Average
Remaining
Contractual
Term (years)		Aggregate
Intrinsic
Value
(in thousands)		Shares Retained to Cover Statutory Minimum Withholding Taxes
Non-vested at January 1, 2023788,217 $28.24  — 
Granted597,436 30.05  — 
Vested(332,078)25.00  (109,740)
Forfeited(42,805)32.22  — 
Non-vested at June 30, 20231,010,770 $30.211.10$32,314

Information with respect to the Company’s non-vested performance-based restricted stock units for the six months ended June 30, 2023 was as follows:
 Number of Performance-based Restricted Stock UnitsWeighted-
Average
Grant-Date
Fair Value		Weighted-
Average
Remaining
Contractual
Term (years)		Aggregate
Intrinsic
Value
(in thousands)		Shares Retained to Cover Statutory Minimum Withholding Taxes
Non-vested at January 1, 2023294,011 $23.20  — 
Granted240,598 26.12  — 
Vested(254,320)15.34  (114,881)
Forfeited— —  — 
Non-vested at June 30, 2023280,289 $32.851.43$8,961
Share-based Payment Arrangement, Expensed and Capitalized, Amount tock-based compensation expense by award type for the three and six months ended June 30, 2023 and 2022 (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
 2023202220232022
Share-based compensation expense by type:
Time-based Restricted Stock Units$4,748 $2,952 $8,913 $5,380 
Performance-based Restricted Stock Units1,140 643 2,022 1,591 
ESPP54 50 100 96 
Total share-based compensation expense$5,942 $3,645 $11,035 $7,067 
Stock-based compensation was included in the following captions in the Company’s condensed consolidated statements of operations for the three and six months ended June 30, 2023 and 2022 (in thousands):

Three Months Ended June 30,Six Months Ended June 30,
 2023202220232022
Cost of revenues$984 $589 $1,413 $1,015 
Research and development expenses1,216 515 1,684 865 
Marketing and selling expenses1,036 800 1,845 1,398 
General and administrative expenses2,706 1,741 6,093 3,789 
Total share-based compensation expense$5,942 $3,645 $11,035 $7,067