Note 8 - Share-based Compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member]	3 Months Ended
Sep. 30, 2018 $ / shares shares
Number of RSUs outstanding (in shares) \| shares	752,391
RSUs outstanding, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.31
Number of RSUs granted (in shares) \| shares
RSUs granted, weighted average grant date fair value (in dollars per share) \| $ / shares
Number of RSUs expired/forfeited (in shares) \| shares	(37,000)
RSUs expired/forfeited, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.19
Number of RSUs outstanding (in shares) \| shares	715,391
RSUs outstanding, weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.32

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

Number of shares under non-option equity instrument agreements that were either cancelled or expired.

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- Definition

Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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)(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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