Note 13 - Subsequent Events	9 Months Ended
Sep. 30, 2016
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 13 — SUBSEQUENT EVENTS As previously disclosed, the Company is a Maryland corporation that was incorporated in May 2016 to be the successor to Ottawa Savings Bancorp upon completion of the second-step conversion of the Bank from the two-tier mutual holding company structure to the stock holding company structure. Ottawa Savings Bancorp MHC was the former mutual holding company for Ottawa Savings Bancorp prior to completion of the second-step conversion. The second-step conversion was completed on October 11, 2016 and, in connection with the completion of the conversion, on that date Ottawa Savings Bancorp MHC merged into Ottawa Savings Bancorp (and ceased to exist), and Ottawa Savings Bancorp merged into the Company, with the Company as the surviving entity. As part of the second-step conversion, the Company conducted a subscription and community offering for shares of Company common stock to depositors and certain borrowers of the Bank, as well as other members of the general public. Upon completion of the conversion and offering, the Company sold, for gross proceeds of $23.8 million, a total of 2,383,950 shares of common stock at $10.00 per share, including 190,716 shares purchased by the Bank’s employee stock ownership plan. The conversion offering was oversubscribed by the community and, as a result, the Company was required to return the excess subscription funds it held at September 30, 2016 to members of the community whose orders were not fulfilled in full following the October 11, 2016 closing date. The subscription funds held by the Company at September 30, 2016 contributed significantly to the $62.5 million increase in assets and $55.2 million increase in total deposits, respectively, as compared to December 31, 2015. Subscription funds held by the Company at September 30, 2016, was also the primary reason for the increase in federal funds sold to $54.3 million at September 30, 2016 as compared to December 31, 2015. The return of subscription funds to certain members of the community following the completion of the second-step conversion reduced total assets and total deposits by $29.5 million in October 2016. For more information on the impact of the subscription funds received in connection with the second-step conversion and offering on the Company’s financial position at September 30, 2016, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” As part of the second-step conversion, each of the existing outstanding shares of Ottawa Savings Bancorp common stock owned by persons other than Ottawa Savings Bancorp MHC was converted into 1.1921 of a share of Company common stock.

NOTE 13 — SUBSEQUENT EVENTS

As previously disclosed, the Company is a Maryland corporation that was incorporated in May 2016 to be the successor to Ottawa Savings Bancorp upon completion of the second-step conversion of the Bank from the two-tier mutual holding company structure to the stock holding company structure. Ottawa Savings Bancorp MHC was the former mutual holding company for Ottawa Savings Bancorp prior to completion of the second-step conversion. The second-step conversion was completed on October 11, 2016 and, in connection with the completion of the conversion, on that date Ottawa Savings Bancorp MHC merged into Ottawa Savings Bancorp (and ceased to exist), and Ottawa Savings Bancorp merged into the Company, with the Company as the surviving entity.

As part of the second-step conversion, the Company conducted a subscription and community offering for shares of Company common stock to depositors and certain borrowers of the Bank, as well as other members of the general public. Upon completion of the conversion and offering, the Company sold, for gross proceeds of $23.8 million, a total of 2,383,950 shares of common stock at $10.00 per share, including 190,716 shares purchased by the Bank’s employee stock ownership plan. The conversion offering was oversubscribed by the community and, as a result, the Company was required to return the excess subscription funds it held at September 30, 2016 to members of the community whose orders were not fulfilled in full following the October 11, 2016 closing date.

The subscription funds held by the Company at September 30, 2016 contributed significantly to the $62.5 million increase in assets and $55.2 million increase in total deposits, respectively, as compared to December 31, 2015. Subscription funds held by the Company at September 30, 2016, was also the primary reason for the increase in federal funds sold to $54.3 million at September 30, 2016 as compared to December 31, 2015. The return of subscription funds to certain members of the community following the completion of the second-step conversion reduced total assets and total deposits by $29.5 million in October 2016.

For more information on the impact of the subscription funds received in connection with the second-step conversion and offering on the Company’s financial position at September 30, 2016, see

“Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

As part of the second-step conversion, each of the existing outstanding shares of Ottawa Savings Bancorp common stock owned by persons other than Ottawa Savings Bancorp MHC was converted into 1.1921 of a share of Company common stock.