COMPUTATION OF EARNINGS (LOSS) PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Numerator:
Net loss	$ (13,405)	$ (25,910)	$ (88,420)	$ (70,781)
Denominator:
Weighted average common shares-basic (in shares)	40,970	39,584	40,715	39,411
Weighted average common shares-diluted (in shares)	40,970	39,584	40,715	39,411
Basic earnings (loss) per common share (in dollars per share)	$ (0.33)	$ (0.65)	$ (2.17)	$ (1.80)
Diluted earnings (loss) per common share (in dollars per share)	$ (0.33)	$ (0.65)	$ (2.17)	$ (1.80)
Potentially dilutive securities excluded from diluted earnings per common share because their effect is anti-dilutive	1,153	1,758	1,337	912