Balance held at close of period in number of shares.

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Name:	us-gaap_InvestmentOwnedBalanceShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Note 7 - Restricted Investment in Stocks (Details Textual)	9 Months Ended
	Sep. 30, 2019 USD ($) shares	Dec. 31, 2018 USD ($)	Jun. 28, 2018
Investment Holdings [Line Items]
Restricted investment in stocks	$ 2,081,000	$ 797,000
Other than temporary impairment charge of restricted investment	0
Investment in Federal Home Loan Bank Stock [Member]
Investment Holdings [Line Items]
Restricted investment in stocks	2,069,000
Investment in Atlantic Community Bankers Bank Stock [Member]
Investment Holdings [Line Items]
Restricted investment in stocks	12,000
VISA Class B Stock [Member]
Investment Holdings [Line Items]
Restricted investment in stocks	$ 0
Number of shares owned \| shares	6,502
VISA Class A Stock [Member]
Investment Holdings [Line Items]
Conversion factor per share			1.6298