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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 9 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2002	Aug. 31, 2018	Aug. 31, 2017
Stock Repurchased During Period, Value	$ 130	$ 276
Former Chief Operating Officer [Member
Severance Costs		235
Severance Payment		$ 60
August 2017 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount					$ 250
Stock Repurchased During Period, Shares		55,199
Stock Repurchased During Period, Value		$ 201
August 2018 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount				$ 250
Stock Repurchased During Period, Shares	32,769	21,002
Stock Repurchased During Period, Value	$ 133	$ 83
Officers [Member]
Disability and Life Insurance Plans, Period			3 years
Other Participants Except Officers [Member]
Disability and Life Insurance Plans, Period			2 years