Emergence from Voluntary Reorganization under Chapter 11 / Fresh Start Accounting Schedule of Fresh-Start Adjustments (Details) - USD ($) $ in Thousands	May 31, 2020	May 30, 2020
Current assets:
Cash and cash equivalents	$ 10,592	$ 21,253
Restricted cash	16,173	4,452
Receivables
Trade, net of allowance for doubtful accounts	33,537	33,537
Unbilled receivables	9,163	9,163
Insurance recoveries	23,636	23,636
Other receivables	6,256	5,256
Inventory	14,129	21,012
Assets held for sale	1,854	1,825
Prepaid expenses and other current assets	5,769	4,817
Total current assets	121,109	124,951
Property and equipment, at cost	195,971	1,082,704
Less accumulated depreciation	0	655,512
Net property and equipment	195,971	427,192
Intangible assets, net of accumulated amortization	9,370	0
Deferred income taxes	8,740	10,897
Operating lease assets	5,234	5,234
Other noncurrent assets	12,199	13,247
Total assets	352,623	581,521
Current liabilities:
Accounts payable	15,123	24,601
Deferred revenues	121	121
Commitment Premium	0	9,584
Debtor in possession financing	0	4,000
Accrued expenses:
Employee compensation and related costs	4,970	4,970
Insurance claims and settlements	23,517	23,517
Insurance premiums and deductibles	5,269	5,269
Interest	44	3,775
Other	16,755	12,436
Total current liabilities	65,799	88,273
Long-term debt, less unamortized discount and debt issuance costs	141,239	175,000
Noncurrent operating lease liabilities	4,189	4,189
Deferred income taxes	1,071	4,296
Other noncurrent liabilities	1,366	1,366
Total liabilities not subject to compromise	213,664	273,124
Liabilities subject to compromise	0	308,422
Shareholders' equity:
Predecessor common stock	0	8,893
Fresh Start Adjustment Increase Decrease Common Stock, Outstanding	1	0
Predecessor additional paid-in capital	0	553,631
Fresh Start Adjustment Increase Decrease Additional Paid in Capital, Successor	138,958	0
Predecessor treasury stock	0	(5,098)
Retained earnings (Accumulated deficit)	0	(557,451)
Total stockholders' equity	138,959	(25)
Total liabilities and stockholders' equity	$ 352,623	581,521
Reorganization Adjustments [Member]
Current assets:
Cash and cash equivalents		(10,661)
Restricted cash		11,721
Receivables
Trade, net of allowance for doubtful accounts		0
Unbilled receivables		0
Insurance recoveries		0
Other receivables		1,000
Inventory		0
Assets held for sale		0
Prepaid expenses and other current assets		0
Total current assets		2,060
Property and equipment, at cost		0
Less accumulated depreciation		0
Net property and equipment		0
Intangible assets, net of accumulated amortization		0
Deferred income taxes		0
Operating lease assets		0
Other noncurrent assets		(5,023)
Total assets		(2,963)
Current liabilities:
Accounts payable		(9,478)
Deferred revenues		0
Commitment Premium		(9,584)
Debtor in possession financing		(4,000)
Accrued expenses:
Employee compensation and related costs		0
Insurance claims and settlements		0
Insurance premiums and deductibles		0
Interest		(3,731)
Other		4,329
Total current liabilities		(22,464)
Long-term debt, less unamortized discount and debt issuance costs		(53,831)
Noncurrent operating lease liabilities		0
Deferred income taxes		0
Other noncurrent liabilities		0
Total liabilities not subject to compromise		(76,295)
Liabilities subject to compromise		(308,422)
Shareholders' equity:
Predecessor common stock		(8,893)
Fresh Start Adjustment Increase Decrease Common Stock, Outstanding		1
Predecessor additional paid-in capital		(553,631)
Fresh Start Adjustment Increase Decrease Additional Paid in Capital, Successor		98,413
Predecessor treasury stock		5,098
Retained earnings (Accumulated deficit)		840,766
Total stockholders' equity		381,754
Total liabilities and stockholders' equity		(2,963)
Fresh Start Accounting Adjustments [Member]
Current assets:
Cash and cash equivalents		0
Restricted cash		0
Receivables
Trade, net of allowance for doubtful accounts		0
Unbilled receivables		0
Insurance recoveries		0
Other receivables		0
Inventory		(6,883)
Assets held for sale		29
Prepaid expenses and other current assets		952
Total current assets		(5,902)
Property and equipment, at cost		(886,733)
Less accumulated depreciation		(655,512)
Net property and equipment		(231,221)
Intangible assets, net of accumulated amortization		9,370
Deferred income taxes		(2,157)
Operating lease assets		0
Other noncurrent assets		3,975
Total assets		(225,935)
Current liabilities:
Accounts payable		0
Deferred revenues		0
Commitment Premium		0
Debtor in possession financing		0
Accrued expenses:
Employee compensation and related costs		0
Insurance claims and settlements		0
Insurance premiums and deductibles		0
Interest		0
Other		(10)
Total current liabilities		(10)
Long-term debt, less unamortized discount and debt issuance costs		20,070
Noncurrent operating lease liabilities		0
Deferred income taxes		(3,225)
Other noncurrent liabilities		0
Total liabilities not subject to compromise		16,835
Liabilities subject to compromise		0
Shareholders' equity:
Predecessor common stock		0
Fresh Start Adjustment Increase Decrease Common Stock, Outstanding		0
Predecessor additional paid-in capital		0
Fresh Start Adjustment Increase Decrease Additional Paid in Capital, Successor		40,545
Predecessor treasury stock		0
Retained earnings (Accumulated deficit)		(283,315)
Total stockholders' equity		(242,770)
Total liabilities and stockholders' equity		$ (225,935)