CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 25, 2020	Jan. 26, 2019	Jan. 25, 2020	Jan. 26, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 2,005	$ 7,571	$ 4,572	$ 13,839
Other comprehensive income:
Amortization of pension actuarial loss, net of tax	102	102	203	204
Pension settlement loss, net of tax	871	0	871	0
Pension remeasurement, net of tax	(704)	0	(704)	0
Comprehensive income	$ 2,274	$ 7,673	$ 4,942	$ 14,043