Note 2 - Investments - Fair Value Hierarchy (Details) - USD ($)	Oct. 01, 2017	Jul. 02, 2017
Equity Securities [Member]
Fair Value Hierarchy	$ 5,508,392	$ 5,272,318
Fair Value	5,508,392	5,272,318
Mutual Fund [Member]
Fair Value Hierarchy	1,837,820	2,817,392
Fair Value	1,837,820	2,817,392
Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy	7,346,212	8,089,710
Fair Value	7,346,212	8,089,710
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value Hierarchy	5,508,392	5,272,318
Fair Value	5,508,392	5,272,318
Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value Hierarchy	1,837,820	2,817,392
Fair Value	1,837,820	2,817,392
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy	133,880	133,922
Fair Value	133,880	133,922
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
Fair Value Hierarchy	133,880	133,922
Fair Value	133,880	133,922
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 2 [Member] | Mutual Fund [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Fair Value Hierarchy
Fair Value
Fair Value, Inputs, Level 3 [Member] | Mutual Fund [Member]
Fair Value Hierarchy
Fair Value