Note 3 - Investments - Fair Value Hierarchy (Details) - USD ($)	12 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$ (518,086)	$ (821,015)
Cumulative Unrealized Gain (Loss)	3,497,440	4,009,652
Equity Securities [Member]
Available-for-sale Securities, Total	4,816,804	5,272,318
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(455,514)	(729,508)
Cumulative Unrealized Gain (Loss)	3,536,890	3,992,404
Mutual Fund [Member]
Available-for-sale Securities, Total	1,824,846	2,817,392
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(62,572)	(91,507)
Cumulative Unrealized Gain (Loss)	(39,450)	17,248
Certificates of Deposit [Member]
Available-for-sale Securities, Total	333,029	133,922
Available-for-sale Securities, Gross Unrealized Gain (Loss)
Cumulative Unrealized Gain (Loss)
Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities, Total	6,641,650	8,089,710
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Available-for-sale Securities, Total	4,816,804	5,272,318
Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Available-for-sale Securities, Total	1,824,846	2,817,392
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 2 [Member]
Available-for-sale Securities, Total	333,029	133,922
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 2 [Member] | Mutual Fund [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
Available-for-sale Securities, Total	333,029	133,922
Fair Value, Inputs, Level 3 [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 3 [Member] | Mutual Fund [Member]
Available-for-sale Securities, Total
Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
Available-for-sale Securities, Total