Leases (Details 1) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
ROU assets - operating leases	$ 2,367	$ 2,133
ROU assets - finance leases	494	318
ROU assets	2,861	2,451
Current lease liabilities - operating leases	1,487	961
Current lease liabilities - finance leases	118	80
Noncurrent lease liabilities - operating leases	947	1,220
Noncurrent lease liabilities - finance leases	376	238
Total lease liabilities	2,928	2,499
Right of Use Asset
ROU assets - operating leases	2,367	2,133
Property and Equipment, Net
ROU assets - finance leases	$ 494	$ 318