Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Condensed Consolidated Statements of Operations (Unaudited)
Operating revenues	$ 13,056	$ 5,921	$ 31,777	$ 29,449
Operating costs	12,392	6,735	30,439	29,177
Gross profit (loss)	664	(814)	1,338	272
Selling, general and administrative expenses	2,920	3,089	8,653	9,914
Operating loss	(2,256)	(3,903)	(7,315)	(9,642)
Other income (expense):
Other income, net	5	6,371	36	8,061
Interest expense, net	(63)	(46)	(166)	(161)
Income (loss) from operations before income taxes	(2,314)	2,422	(7,445)	(1,742)
Provision for federal and state income taxes	21	21	43	67
Net income (loss)	$ (2,335)	$ 2,401	$ (7,488)	$ (1,809)
Basic and diluted income (loss) per common share:	$ (0.07)	$ 0.07	$ (0.21)	$ (0.06)
Basic and diluted weighted average shares used in computing income (loss) per share:	35,802	35,139	35,492	30,776