Segment Reporting Segment Reporting (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jul. 27, 2019 USD ($) Store segment	Jul. 28, 2018 USD ($)	Apr. 27, 2019 segment
Segment Reporting Information [Line Items]
Revenues	$ 319,657	$ 337,484
Number of Reportable Segments | segment	3		3
Number of Stores | Store	1,491
Gross Profit	$ 71,657	66,610
Depreciation and amortization expense	15,879	16,538
Operating Income (Loss)	(43,812)	(49,072)
Interest expense, net	2,532	3,522
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	$ (46,344)	(52,594)
Number of System Customers | Store	400
Retail Segment [Member]
Segment Reporting Information [Line Items]
Revenues	$ 274,656	287,085
Gross Profit	62,139	56,521
Depreciation and amortization expense	11,977	13,325
Operating Income (Loss)	(35,042)	(42,039)
Wholesale [Member]
Segment Reporting Information [Line Items]
Revenues	72,309	89,944
Gross Profit	14,918	19,545
Depreciation and amortization expense	1,565	1,460
Operating Income (Loss)	$ 8,594	12,446
Number of Wholesale Customers | Store	3,500
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	$ 33	44
Operating Income (Loss)	(5,550)	(5,537)
DSS [Member]
Segment Reporting Information [Line Items]
Revenues	5,374	5,677
Gross Profit	4,414	5,554
Depreciation and amortization expense	2,304	1,709
Operating Income (Loss)	(2,003)	1,066
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(32,682)	(45,222)
Gross Profit	(9,814)	(15,010)
Operating Income (Loss)	$ (9,811)	$ (15,008)
Physical Stores [Member]
Segment Reporting Information [Line Items]
Number of Stores | Store	777
Virtual Stores [Member]
Segment Reporting Information [Line Items]
Number of Stores | Store	714