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Note 14 - Stockholders' Equity (Details Textual) - USD ($) shares in Thousands, $ / shares in Thousands, $ in Millions	6 Months Ended
	Mar. 31, 2018	Mar. 30, 2018	Mar. 31, 2017	Dec. 31, 2017
Common Stock, Dividends, Per Share, Declared		$ 0	$ 0
Share Buyback Program [Member]
Stock Repurchase Program, Authorized Amount				$ 4.0
Stock Repurchased and Retired During Period, Shares	0		0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 3.9

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Paragraph 1
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- Definition

Amount of stock repurchase plan authorized.

+ References

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

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- Definition

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