Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Name:	us-gaap_StockRepurchasedDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 13 - Stock Repurchase Program (Details Textual) - Common Stock [Member] - USD ($)			4 Months Ended
	Aug. 05, 2016	Aug. 11, 2014	Dec. 31, 2016	Aug. 31, 2016	May 07, 2015
Stock Repurchase Program, Authorized Amount				$ 25,000,000	$ 25,000,000
Stock Repurchased and Retired During Period, Shares	130,000		0
Stock Repurchased and Retired During Period, Value	$ 8,195,000
Stock Repurchased During Period, Shares		125,000
Stock Repurchased During Period, Value		$ 6,995,000