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STOCK PLANS (Tables)

6 Months Ended

Jun. 30, 2023

Stockholders' Equity Note [Abstract]

Schedule of Recognized Stock-Based Compensation in Consolidated Statements of Operations

The Company recognized stock-based compensation expense in the periods presented as follows (in thousands):

						Three Months Ended June 30,												Six Months Ended June 30,
						2023						2022						2023						2022
Cost of goods sold						$	1,436					$	1,478					$	3,160					$	2,830
Research and development						1,722						1,520						3,597						2,978
Selling, general and administrative						7,797						8,546						16,188						16,925
Total						$	10,955					$	11,544					$	22,945					$	22,733
Stock-based compensation from:
Stock options						$	5,742					$	6,542					$	12,206					$	13,327
Restricted stock units						4,969						4,717						10,219						8,830
Employee stock purchase plan						244						285						520						576
Total						$	10,955					$	11,544					$	22,945					$	22,733

Schedule of the Company's Stock Option Activity and Restricted Stock Unit Activity

The following tables contain information about the Company’s stock option and restricted stock unit, or RSU, activity for the six months ended June 30, 2023:

Stock Options						Number of Stock Options						Weighted Average Exercise Price (Per Share)
Outstanding at December 31, 2022						6,272,994						$	52.38
Granted						1,426,343						39.15
Exercised						(61,896)						30.91
Forfeited						(106,927)						57.38
Expired						(88,438)						55.06
Outstanding at June 30, 2023						7,442,076						49.91

Restricted Stock Units						Number of Restricted Stock Units						Weighted Average Grant Date Fair Value (Per Share)
Unvested at December 31, 2022						1,149,462						$	57.26
Granted						759,762						39.24
Vested						(368,641)						54.96
Forfeited						(95,349)						58.56
Unvested at June 30, 2023						1,445,234						48.27

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

The fair values of stock options granted were estimated using the Black-Scholes option valuation model with the following weighted average assumptions:

Black-Scholes Weighted Average Assumption						Six Months Ended June 30, 2023
Expected dividend yield						None
Risk-free interest rate						4.00%
Expected volatility						41.32%
Expected term of options						4.86 years

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