Loans Receivable, Net - Credit Quality Indicators(Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 545,552	$ 588,628	[1],[2]
Multifamily
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	88,750	95,580	[1],[3],[4]
Multifamily | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	87,148	93,811	[4]
Multifamily | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Multifamily | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,082	1,769
Multifamily | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	520	0
Multifamily | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	242,818	273,400	[1],[3],[4]
Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	238,552	262,867	[4]
Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	771	4,239
Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	3,495	6,294
Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Construction
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	4,949	5,000
Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	4,949	5,000
Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Construction | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Business
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	65,114	70,953	[1],[3],[4]
Business | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	58,555	61,092	[4]
Business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	133	2,039
Business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	6,426	7,822
Business | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
Business | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	0	0
One-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	134,927	143,653	[1],[3],[4]
One-to-four family | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	131,028	140,706	[4]
One-to-four family | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	3,899	2,947
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	8,994	42
Consumer | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	8,992	42
Consumer | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 2	$ 0

[1] (1) March 31, 2016 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Equity in net loss from subsidiaries was increased and total income was reduced by $1.5 million, interest expense on borrowings and total expense were increased by $66 thousand, and net loss and comprehensive loss were increased $1.6 million. Refer to Notes 1 and 19 for further detail.

[2] (1) March 31, 2016 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 19 for further detail.

[3] (1) March 31, 2015 and 2016 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 19 for further detail.

[4] (1) March 31, 2016 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 19 for further detail.