EARNINGS PER SHARE - Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2022	Oct. 01, 2021
Numerator:
Net income (loss)	$ 8,740	$ 1,530	$ 22,051	$ (6,603)
Denominator:
Basic (in shares)	105,228	102,099	104,617	101,057
Diluted (in shares)	113,185	106,421	110,911	101,057
Net income (loss) per share:
Basic (in dollars per share)	$ 0.08	$ 0.01	$ 0.21	$ (0.07)
Diluted (in dollars per share)	$ 0.08	$ 0.01	$ 0.20	$ (0.07)
Stock options
Denominator:
Weighted average number diluted shares outstanding, Basic (in shares)	218	311	238	0
Restricted stock units
Denominator:
Weighted average number diluted shares outstanding, Basic (in shares)	1,920	1,185	1,725	0
Stock purchase rights under the ESPP
Denominator:
Weighted average number diluted shares outstanding, Basic (in shares)	63	9	44	0
2022 Notes
Denominator:
Weighted average number diluted shares outstanding, Basic (in shares)	3,078	2,356	2,718	0
2024 Notes
Denominator:
Weighted average number diluted shares outstanding, Basic (in shares)	2,678	461	1,569	0