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Note 15 - Commitments and Contingencies (Details Textual) - USD ($)		7 Months Ended	9 Months Ended	12 Months Ended
	Apr. 07, 2017	Aug. 15, 2016	Oct. 01, 2017	Dec. 31, 2016	Oct. 02, 2016
Standard and Extended Product Warranty Accrual			$ 587,000	$ 856,000
Extended Product Warranty Accrual, Increase for Warranties Issued			14,000	162,000
Accrual for Environmental Loss Contingencies			0	0
Inventory, Net			22,121,000	$ 14,558,000
Purchase Obligation			3,146,000
Tampa Facility Litigation [Member]
Cost of Property Repairs and Maintenance			52,000
Litigation Settlement, Expense	$ 448,000
Customer Lawsuit Against Distributor [Member] | Inventory Related to Customer Involved in Lawsuit Against Distributor [Member]
Inventory, Net			$ 984,000
Accrued Liabilities [Member] | Tampa Facility Litigation [Member]
Loss Contingency Accrual					$ 500,000
Link Encryption Products [Member] | Minimum [Member]
Extended Product Warranty Term		3 years
Link Encryption Products [Member] | Maximum [Member]
Extended Product Warranty Term		5 years

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+ References

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