(LOSS) PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 29, 2020 $ / derivative shares	Dec. 31, 2021 USD ($) $ / shares $ / derivative shares	Dec. 31, 2020 USD ($) $ / shares $ / derivative shares	Dec. 31, 2019 USD ($) $ / shares $ / derivative shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) | $		$ (63,040)	$ (61,373)	$ (90,433)
Weighted-average common shares outstanding (in shares)		81,387	80,336	79,055
(Loss) per share, basic (in dollars per share) | $ / shares		$ (0.77)	$ (0.76)	$ (1.14)
Effective of dilutive securities (in shares)		0	0	0
Weighted - average common shares outstanding, assuming dilution (in shares)		81,387	80,336	79,055
(Loss) per share, diluted (in dollars per share) | $ / shares		$ (0.77)	$ (0.76)	$ (1.14)
Outstanding anti-dilutive stock options and RSUs (in shares)		5,862	6,278	5,911
Convertible debt (in shares)		4,400	4,400	4,400
Number of shares issuable upon conversion	4,400	4,400	4,400	4,400
Cap price (in dollars per share) | $ / derivative	196.44	196.44	196.44	196.44
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average effect of dilutive securities (in shares)		0	0	0
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average effect of dilutive securities (in shares)		0	0	0