Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - shares	9 Months Ended
Sep. 30, 2018	Mar. 31, 2019
Home Town Residential Mortgage LLC [Member]
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	49.00%
Scenario, Forecast [Member] \| American National [Member]
Business Acquisition, Shares Received for Each Share of Common Stock		0.415

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration