Note 13 - Recent Accounting Pronouncements and Developments (Details Textual)	3 Months Ended
	Apr. 02, 2017 USD ($)
Reclassification of Current Deferred Tax Assets to Noncurrent [Member]
Current Period Reclassification Adjustment	$ 94,000
Reclassification of Current Deferred Tax Assets to Noncurrent [Member] | December 31, 2016 [Member]
Prior Period Reclassification Adjustment	94,000
Accounting Standards Update 2016-09 [Member]
Deferred Tax Assets, Gross	1,200
Deferred Tax Assets, Valuation Allowance	$ 1,200