Note 5 - New Accounting Standards - Impact of Adoption on AOCI and Retained Earnings (Details) (Parentheticals) - Accounting Standards Update 2016-01 [Member]	Jul. 02, 2018 USD ($)
AOCI Attributable to Parent [Member]
Reclassification to cumulative effect adjustment to initially apply new accounting guidance for equity investments which were previously classified as available-for-sale, tax	$ 1,394,695
Reclassification of cumulative effect adjustment to initially apply new accounting guidance for equity investments which were previously classified as available-for-sale, tax	(1,394,695)
Retained Earnings [Member]
Reclassification to cumulative effect adjustment to initially apply new accounting guidance for equity investments which were previously classified as available-for-sale, tax	(1,394,695)
Reclassification of cumulative effect adjustment to initially apply new accounting guidance for equity investments which were previously classified as available-for-sale, tax	$ 1,394,695