Loss Per Share - Schedule of Reconciliation of Components Used to Compute Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014		Dec. 31, 2014
Earnings Per Share [Abstract]
Net income (loss)	$ (326)	$ (176)		$ (1,416)
Weighted average common shares outstanding	663,369	680,353
Basic and diluted income (loss) per share	$ (0.49)	$ (0.26)	[1]

[1] Per share amounts for 2014 have been adjusted to reflect the completion of the Company's conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.