Discontinued Operations - Pretax Loss of the Cable Transaction (Details) - Cable TV Business Segment - USD ($) $ in Thousands			12 Months Ended
	May 29, 2019	Nov. 29, 2018	Sep. 30, 2019	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract price	$ 10,300
Less: Real estate sales				$ 2,100
Less: Working capital adjustment				$ 1,100
Net purchase price			$ 14,200
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract price	10,314
Less: Real estate sales	2,075
Less: Working capital adjustment	1,111
Net purchase price	7,128	$ 7,075	14,203
Assets sold:
Accounts receivable	2,038
Inventories	10,259
Prepaids and other assets	73
Property and equipment, net	336
Assets	12,706
Liabilities transferred:
Accounts payable	1,306
Accrued expenses	467
Liabilities	1,773
Net assets sold	10,933
Pretax loss on sale of net assets of Cable TV segment	$ (3,805)	$ 2,312	$ (1,491)