Note 6 - Stockholders' Equity (Details Textual) - Stock Repurchase Program [Member] - USD ($)	3 Months Ended	9 Months Ended	10 Months Ended
Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2019	Dec. 05, 2018
Stock Repurchase Program, Authorized Amount				$ 2,400,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				409,000
Stock Repurchased During Period, Shares	22,458	115,164	133,266

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern 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.

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration