Loans Receivable, Net - Text Tag (Details)	12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 6,400,000	$ 7,800,000
Financing Receivable, Modifications, Number of Contracts		2
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 429,000
FNMA & 3rd party loans excluded from financial statements	25,700,000	28,100,000
Loans Pledged as Collateral	25,600,000
Loans Receivable, Individually Evaluated for Impairment	14,693,000	19,565,000
Allowance for Loan Losses, Individually Evaluated for Impairment	361,000	590,000
Loans Receivable, Impaired, Interest Lost on Nonaccrual Loans	404,000	476,000
Loans 90 Days Past Due and Still Accruing	0	$ 0
Other non-performing asset	$ 1,900,000
Number of Real Estate Properties	8	7
Loans held-for-sale (HFS)	$ 944,000	$ 2,436,000	[1],[2]
Modified Loan Subsequently Defaulted	0	0
Loans and Leases Receivable, Related Parties	$ 4,700,000	$ 4,400,000
Loans and Leases Receivable, Related Parties, Additions	1,700,000
Loans and Leases Receivable, Related Parties, Proceeds	1,400,000
Business
Financing Receivable, Modifications [Line Items]
Overdrafts	76,000	103,000
Loans Receivable, Individually Evaluated for Impairment	4,087,000	6,866,000
Allowance for Loan Losses, Individually Evaluated for Impairment	41,000	474,000
Consumer
Financing Receivable, Modifications [Line Items]
Overdrafts	22,000	39,000
Loans Receivable, Individually Evaluated for Impairment	2,000	0
Allowance for Loan Losses, Individually Evaluated for Impairment	2,000	$ 0
One-to-four family
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts		2
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 429,000
Loans Receivable, Individually Evaluated for Impairment	5,507,000	4,636,000
Allowance for Loan Losses, Individually Evaluated for Impairment	306,000	95,000
Non-performing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,500,000	2,200,000
Performing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 3,900,000	$ 5,600,000
Financing Receivable, Modifications, Number of Contracts	11	11

[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. Investment in subsidiaries, total assets and total liabilities and stockholders' equity were each reduced by $2.2 million, other liabilities and total liabilities increased by $157 thousand and stockholders' equity was reduced by $2.3 million. Refer to Notes 1 and 19 for further detail.