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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
 12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Current tax provision:      
U.S. federal $ 0 $ 0 $ 0
State 10,000 12,000 18,000
Foreign 1,220,000 378,000 1,031,000
Total current provision 1,230,000 390,000 1,049,000
Deferred tax provision (benefit):      
U.S. federal and state 0 (546,000) 0
Foreign 441,000 (1,000) (1,364,000)
Total deferred provision (benefit) 441,000 (547,000) (1,364,000)
Provision (benefit) for income taxes $ 1,671,000 $ (157,000) $ (315,000)