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Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Oct. 01, 2016	Aug. 21, 2017
Stock Repurchased and Retired During Period, Value		$ 998	$ 1,469
The August 2017 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount				$ 20,000
Stock Repurchased and Retired During Period, Value	$ 1,000
Stock Repurchased and Retired During Period, Shares	112,325
Share Price	$ 8.88	$ 8.88

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Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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