Leases (Details 1) $ in Thousands	Dec. 28, 2019 USD ($)
Leases [Abstract]
Within one year	$ 5,961
One to two years	5,090
Two to three years	3,647
Three to four years	3,196
Four to five years	2,507
Thereafter	17,174
Total future undiscounted lease payments	37,575
Less: imputed interest	(7,837)
Total operating lease liabilities	$ 29,738