Federal and State Income Taxes (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Total income tax expense	$ 110	$ 10,087
Pre-tax loss income tax benefit	5,600	6,200
Prior year adjustments and true-ups	169	(141)
Research and development credit		(68)
Change in valuation allowance	856	8,261
State income tax expenses	20	(90)
Foreign payable true-up foreign tax credit	19
Federal net operating loss carry-forward	$ 27,800
Operating loss carryforwards, expiration	2032
Deferred tax assets, tax credit carryforwards, alternative minimum tax		100
Deferred tax assets, tax credit carryforwards, research		$ 1,100
Research and development tax credit expiration	2030
Foreign tax credits,expiration	2025
Operating loss carryforward description	Under the new law, for NOLs generated in tax year 2018 and forward, the 2 year carryback is repealed and the carryforward is indefinite. However, the utilization of 2018 generated NOLs are limited to 80% of taxable income. For NOLs incurred in tax year 2017 and prior, the limitation to 80% of taxable income does not apply, but the NOLs are subject to expiration.
Decrease Effective Tax Rate 3.83% [Member]
Prior year adjustments and true-ups	$ 213
Increase Effective Tax Rate 1.22% [Member]
Research and development credit	68
Decrease Effective Tax Rate 2.17% [Member]
Deferred tax true-up to federal expense on state benefit and foreign tax credit true-up	121
Decrease Effective Tax Rate 15.39% [Member]
Change in valuation allowance	855
Decrease Effective Tax Rate 0.37% [Member]
State income tax expenses	20
Increased Effective Tax Rate 0.34% [Member]
Foreign payable true-up foreign tax credit	19
Decrease Effective Tax Rate 0.34% [Member]
Foreign payable true-up foreign tax credit	$ 19