Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 27, 2021	Mar. 28, 2020
NET LOSS		$ (2,028)	$ (2,689)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Unrealized gain (loss) on interest rate swaps		38	(1,137)
Income taxes		0	0
Unrealized gain (loss) on interest rate swaps, net		38	(1,137)
Reclassification of loss into earnings from interest rate swaps (1)	[1]	221	208
Income taxes		64	0
Reclassification of loss into earnings from interest rate swaps, net		157	208
Reclassification of net actuarial gain into earnings from postretirement benefit plans (2)	[2]	(6)	(7)
Income taxes		0	0
Reclassification of net actuarial gain into earnings from postretirement benefit plans, net		(6)	(7)
Reclassification of prior service credits into earnings from postretirement benefit plans (2)	[2]	0	(1)
Income taxes		0	0
Reclassification of prior service credits into earnings from postretirement benefit plans, net		0	(1)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX		189	(937)
COMPREHENSIVE LOSS		$ (1,839)	$ (3,626)

[1] Amounts for cash flow hedges reclassified from accumulated other comprehensive income (loss) to net loss were included in interest expense in the Company's Consolidated Condensed Statements of Operations.

[2] Amounts for postretirement plans reclassified from accumulated other comprehensive income (loss) to net loss were included in selling and administrative expenses in the Company's Consolidated Condensed Statements of Operations.