SEGMENT INFORMATION (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020	Dec. 26, 2020
Revenue	$ 5,921,000	$ 15,729,000	$ 29,449,000	$ 52,871,000
Gross profit (loss)	$ (814,000)	$ 1,144,000	$ 272,000	$ 6,857,000
Gross profit margin	13.70%	7.30%	0.90%	13.00%
SG&A	$ 3,089,000	$ 2,174,000	$ 9,914,000	$ 6,621,000
Operating income (loss)	(3,903,000)	(1,030,000)	(9,642,000)	236,000
Other income, net	6,371,000	4,000	8,061,000	6,000
Interest expense, net	(46,000)	(62,000)	(161,000)	(103,000)
Tax expense	(21,000)	(22,000)	(67,000)	(80,000)
Net Income (Loss)	2,401,000	(1,110,000)	(1,809,000)	59,000
Total assets	42,337,000		42,337,000		$ 30,438,000
Commercial
Revenue	3,935,000	13,867,000	23,141,000	45,180,000
Gross profit (loss)	$ (1,089,000)	$ 985,000	$ (375,000)	$ 5,740,000
Gross profit margin	(27.70%)	7.10%	(1.60%)	12.70%
SG&A	$ 1,534,000	$ 826,000	$ 5,643,000	$ 2,488,000
Operating income (loss)	(2,623,000)	159,000	(6,018,000)	3,252,000
Total assets	8,725,000		8,725,000		11,130,000
Government Services
Revenue	1,986,000	1,862,000	6,308,000	7,691,000
Gross profit (loss)	$ 275,000	$ 159,000	$ 647,000	$ 1,117,000
Gross profit margin	13.80%	8.50%	10.30%	14.50%
SG&A	$ 280,000	$ 165,000	$ 677,000	$ 485,000
Operating income (loss)	(5,000)	(6,000)	(30,000)	632,000
Total assets	3,398,000		3,398,000		3,151,000
Corporate
Revenue	0	0	0	0
Gross profit (loss)	0	0	0	0
SG&A	1,275,000	1,183,000	3,594,000	3,648,000
Operating income (loss)	(1,275,000)	$ (1,183,000)	(3,594,000)	$ (3,648,000)
Total assets	$ 30,214,000		$ 30,214,000		$ 16,157,000