Note 6 - Share-Based Compensation (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 454,000		$ 454,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			332 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	30,000	155,000	40,000	237,500
Share-based Compensation Arrangement By Share-based Payment Award Options Grants in Period Fair Value	$ 11,000	$ 52,000	$ 14,000	$ 87,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0	0	8,250	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0	32,000	26,250	70,750

Fair value of the options grants in period.

No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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