Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Note 6 - Acquisitions (Details Textual) - USD ($) $ in Thousands			9 Months Ended		12 Months Ended
	Oct. 01, 2017	Apr. 16, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Payment for Contingent Consideration Liability, Financing Activities			$ 300	$ 790
Payments to Acquire Businesses, Gross			300	$ 800
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			$ 2,400
RAF Services, Inc [Member]
Business Combination, Consideration Transferred, Total		$ 133
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total		$ 123
Payment for Contingent Consideration Liability, Financing Activities					$ 10
PSR Engineering Solutions d.o.o. Beograd (Voždovac) [Member]
Business Combination, Consideration Transferred, Total	$ 3,248
Payments to Acquire Businesses, Gross	1,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	1,763
Business Combination, Consideration Transferred, Liabilities Incurred	485
Cash Acquired from Acquisition	237
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total	$ 58