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Note 15 - Related Party Transactions (Details Textual) - USD ($)			12 Months Ended
	Jun. 26, 2018	Mar. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Related Party Deposit Liabilities			$ 505,000	$ 178,000
Series E and Series F Preferred Stock [Member]
Payments for Repurchase of Preferred Stock and Preference Stock	$ 3,500,000
Preferred Stock, Liquidation Preference, Value	$ 10,500,000
Private Placement [Member]
Shares Issued, Price Per Share		$ 13
Sale of Stock, Consideration Received on Transaction		$ 14,900,000
Private Placement [Member] \| Voting Common Stock [Member]
Stock Issued During Period, Shares, New Issues		150,000
Private Placement [Member] \| Nonvoting Common Stock [Member]
Stock Issued During Period, Shares, New Issues		1,000,000
Real Estate Management Fees [Member] \| Hogan Development [Member]
Related Party Transaction, Amounts of Transaction			20,000	20,000
Real Estate Sales Commissions [Member] \| Hogan Development [Member]
Related Party Transaction, Amounts of Transaction			$ 0	$ 0