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Note 3 - Recent Accounting Pronouncements (Details Textual) - USD ($)	Sep. 30, 2018	Jan. 01, 2018	Sep. 30, 2017
Deferred Tax Assets, Valuation Allowance, Total	$ 15,017,000		$ 12,306,000
Deferred Tax Assets, Gross, Total	$ 20,974,000		$ 20,637,000
Accounting Standards Update 2016-09 [Member]
Deferred Tax Assets, Valuation Allowance, Total		$ 1,100,000
Deferred Tax Assets, Gross, Total		$ 1,100,000

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Details

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