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Loans receivable, net of allowance for loan losses (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 584,294 | $ 482,051 | [1] |  |
Percentage of Loan Type |  | 100.00% | 100.00% |  |  |
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums |  | $ 4,725 | $ 1,711 |  |  |
Allowance for loan losses |  | (5,232) | (4,428) | [2],[3],[4] | $ (7,366) | [4]
Loans and Leases Receivable, Net Reported Amount |  | 583,787 | 479,334 | [5],[6] |  |
Loans Receivable Held-for-sale, Amount |  | 2,495 | 2,724 | [2] |  |
Loans Held-for-sale, Fair Value Disclosure |  | 2,495 |  |  | 2,724 | [7]
One-to-four family [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 141,243 | $ 125,549 | [1] |  |
Percentage of Loan Type |  | 24.00% | 26.00% |  |  |
Allowance for loan losses |  | $ (1,697) | $ (1,970) |  | (3,396) | [8]
Multifamily [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 94,202 | $ 93,692 | [1] |  |
Percentage of Loan Type |  | 16.00% | 19.00% |  |  |
Allowance for loan losses |  | $ (622) | $ (502) |  | (422) |
Commercial Real Estate [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 272,497 | $ 186,504 | [1] |  |
Percentage of Loan Type |  | 47.00% | 39.00% |  |  |
Allowance for loan losses |  | $ (1,808) | $ (1,029) |  | (1,835) |
Construction Loans [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 5,033 | $ 5,107 |  |  |
Percentage of Loan Type |  | 1.00% | 1.00% |  |  |
Allowance for loan losses |  | $ (62) | $ (99) |  | 0 |
Commercial Loan [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross |  | $ 71,277 | $ 70,765 | [3] |  |
Percentage of Loan Type |  | 12.00% | 15.00% |  |  |
Allowance for loan losses |  | $ (1,022) | $ (813) |  | (1,705) |
Consumer Loan [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Gross | [9] | $ 42 | $ 434 |  |  |
Percentage of Loan Type | [9] | 0.00% | 0.00% |  |  |
Allowance for loan losses |  | $ (21) | $ (15) | [4] | $ (8) |
[1] | (1) March 31, 2015 and 2014 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 18 for further detail.
[2] | (1) March 31, 2015 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 18 for further detail.
[3] | (1) March 31, 2015 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 18 for further detail.
[4] | (2) March 31, 2015 balances have been restated from previously reported results for the $701 thousand reclassification of negative escrow balances from Other Assets to Loans Receivable a
[5] | (1) March 31, 2015 has been restated to correct the classification of loans held-for-sale and other real estate owned from Level 2 to Level 3 assets and for the reclassification of negative escrow balances from Other Assets to Loans Held-for-Sale.
[6] | 1) March 31, 2015 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 18 for further detail.
[7] | (1) March 31, 2015 balance has been been restated from previously reported amounts to correct for the classification of $981 thousand of interest-bearing deposits from available-for-sale securities to other assets, and the reclassification of negative escrow balances from Other Assets to Loans Receivable and Loans Held-for-Sale.
[8] | (1) March 31, 2015 balances have been restated from previously reported results to correct for material and certain other errors from prior periods. Refer to Notes 1 and 18 for further detail.
[9] | Includes personal loans

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533 + Details
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