Note 6 - Revolving Credit Agreement (Details Narrative) - USD ($)	3 Months Ended	6 Months Ended
	Sep. 27, 2015	May. 24, 2017	Dec. 31, 2014	Sep. 28, 2014	Dec. 31, 2013
Note 7 - Revolving Credit Agreement Details Narrative
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000,000
Letter of credit sub-facility	$ 1,000,000
Line of Credit Maximum Borrowing Capacity may be increased in the last six months of the term		$ 35,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.375%
Line of Credit Facility, Amount Outstanding	$ 0
Line of Credit Facility, Remaining Borrowing Capacity	9,666,000
Unrestricted Cash on hand	$ 14,585,000		$ 17,711,000	$ 15,571,000	$ 16,489,000