XML 36 R32.htm IDEA: XBRL DOCUMENT v3.19.3
Note 1 - Basis of Presentation (Details Textual)
Sep. 30, 2019
Jan. 01, 2019
Jan. 31, 2018
TwinCo Acquisition [Member]      
Business Acquisition, Percentage of Voting Interests Acquired     100.00%
Big Muddy Bancorp Acquisition [Member]      
Business Acquisition, Percentage of Voting Interests Acquired   100.00%  
Opportunity Bank of Montana [Member]      
Noncontrolling Interest, Ownership Percentage by Parent 100.00%