Note 3 - Investments - Summary of Investments (Details) - USD ($)	Jun. 28, 2020	Jun. 30, 2019
Fair Value	$ 5,216,218	$ 7,029,916
Equity Securities [Member]
Original Cost	1,279,914	1,279,914
Unrealized Gain	3,472,568	3,837,143
Unrealized Loss	(27,012)	(16,716)
Fair Value	4,725,470	5,100,341
Mutual Fund [Member]
Original Cost	475,179	1,921,413
Unrealized Gain	15,569	8,162
Unrealized Loss
Fair Value	490,748	1,929,575
Certificates of Deposits and Treasury Bills [Member]
Original Cost	134,202	433,249
Unrealized Gain
Unrealized Loss
Fair Value	$ 134,202	$ 433,249

Amount of accumulated unrealized gain on investment in trading security.

No definition available.

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- Definition

Amount of accumulated unrealized loss on investment in trading security.

+ References

No definition available.

+ Details

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- Definition

Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

No definition available.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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