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Note 15 - Subsequent Event (Details Textual) - USD ($)		3 Months Ended
Note 15 - Subsequent Event (Details Textual) - USD ($)	Sep. 28, 2017	Aug. 31, 2017
Bank Midwest [Member] \| Subsequent Event [Member]
Debt Instrument, Periodic Payment	$ 20,500
Bank Midwest [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 5,000,000
US Bank [Member]
Debt Instrument, Periodic Payment		$ 65,300
US Bank [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 4,500,000