LEASES (Details 1) - USD ($)	Jun. 26, 2021	Dec. 26, 2020
ROU assets - operating leases	$ 1,210,000	$ 1,628,000
ROU assets - finance leases	382,000	442,000
ROU assets	1,592,000	2,070,000
Current lease liabilities - operating leases	1,058,000	1,421,000
Current lease liabilities - finance leases	122,000	120,000
Noncurrent lease liabilities - operating leases	202,000	286,000
Noncurrent lease liabilities - finance leases	265,000	322,000
Total lease liabilities	1,647,000	2,149,000
Property, Plant and Equipment [Member]
ROU assets - finance leases	382,000	442,000
Right of Use Asset
ROU assets - operating leases	$ 1,210,000	$ 1,628,000