Note 9 - Loans (Detail) - Past-Due Loans (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Non-Accrual Balances	$ 5,500	$ 7,200
Total Loan Balances	91,431	100,674
30-89 Days Past Due and Still Accruing [Member] \| Residential (One to Four Family) Real Estate [Member]
30-89 Days Past Due and Still Accruing	2,256
Total Past Due and Still Accruing	2,256
30-89 Days Past Due and Still Accruing [Member] \| Multi-Family and Commercial Real Estate [Member]
30-89 Days Past Due and Still Accruing	440
Total Past Due and Still Accruing	440
30-89 Days Past Due and Still Accruing [Member] \| Commercial Loans [Member]
30-89 Days Past Due and Still Accruing	57
Total Past Due and Still Accruing	57
30-89 Days Past Due and Still Accruing [Member] \| Home Equity Loans [Member]
30-89 Days Past Due and Still Accruing	324
Total Past Due and Still Accruing	324
30-89 Days Past Due and Still Accruing [Member] \| Consumer [Member]
30-89 Days Past Due and Still Accruing	20
Total Past Due and Still Accruing	20
30-89 Days Past Due and Still Accruing [Member] \| Total [Member]
30-89 Days Past Due and Still Accruing	3,097
Total Past Due and Still Accruing	3,097
30-89 Days Past Due and Still Accruing [Member]
Percentage of Total Loans	3.39%
Percentage of Total Loans	3.39%
Percentage of Total Loans	3.39%
90 Days or More Past Due and Still Accruing [Member]
Percentage of Total Loans	0.00%
Percentage of Total Loans	0.00%
Percentage of Total Loans	0.00%
Total Past Due and Still Accruing [Member] \| Residential (One to Four Family) Real Estate [Member]
30-89 Days Past Due and Still Accruing	2,256
Total Past Due and Still Accruing	2,256
Total Past Due and Still Accruing [Member] \| Multi-Family and Commercial Real Estate [Member]
30-89 Days Past Due and Still Accruing	440
Total Past Due and Still Accruing	440
Total Past Due and Still Accruing [Member] \| Commercial Loans [Member]
30-89 Days Past Due and Still Accruing	57
Total Past Due and Still Accruing	57
Total Past Due and Still Accruing [Member] \| Home Equity Loans [Member]
30-89 Days Past Due and Still Accruing	324
Total Past Due and Still Accruing	324
Total Past Due and Still Accruing [Member] \| Consumer [Member]
30-89 Days Past Due and Still Accruing	20
Total Past Due and Still Accruing	20
Total Past Due and Still Accruing [Member] \| Total [Member]
30-89 Days Past Due and Still Accruing	3,097
Total Past Due and Still Accruing	3,097
Total Past Due and Still Accruing [Member]
Percentage of Total Loans	3.39%
Percentage of Total Loans	3.39%
Percentage of Total Loans	3.39%
Accruing Current Balances [Member] \| Residential (One to Four Family) Real Estate [Member]
Accruing Current Balances	61,989
Accruing Current Balances [Member] \| Multi-Family and Commercial Real Estate [Member]
Accruing Current Balances	9,782
Accruing Current Balances [Member] \| Commercial Loans [Member]
Accruing Current Balances	903
Accruing Current Balances [Member] \| Home Equity Loans [Member]
Accruing Current Balances	8,348
Accruing Current Balances [Member] \| Consumer [Member]
Accruing Current Balances	884
Accruing Current Balances [Member] \| Construction [Member]
Accruing Current Balances	896
Accruing Current Balances [Member] \| Total [Member]
Accruing Current Balances	82,802
Accruing Current Balances [Member]
Percentage of Total Loans	90.56%
Percentage of Total Loans	90.56%
Percentage of Total Loans	90.56%
Non-Accrual Balances [Member] \| Residential (One to Four Family) Real Estate [Member]
Non-Accrual Balances	2,310
Non-Accrual Balances [Member] \| Multi-Family and Commercial Real Estate [Member]
Non-Accrual Balances	2,632
Non-Accrual Balances [Member] \| Commercial Loans [Member]
Non-Accrual Balances	305
Non-Accrual Balances [Member] \| Home Equity Loans [Member]
Non-Accrual Balances	285
Non-Accrual Balances [Member] \| Total [Member]
Non-Accrual Balances	5,532
Non-Accrual Balances [Member]
Percentage of Total Loans	6.05%
Percentage of Total Loans	6.05%
Percentage of Total Loans	6.05%
Total [Member] \| Residential (One to Four Family) Real Estate [Member]
Total Loan Balances	66,555
Total [Member] \| Multi-Family and Commercial Real Estate [Member]
Total Loan Balances	12,854
Total [Member] \| Commercial Loans [Member]
Total Loan Balances	1,265
Total [Member] \| Home Equity Loans [Member]
Total Loan Balances	8,957
Total [Member] \| Consumer [Member]
Total Loan Balances	904
Total [Member] \| Construction [Member]
Total Loan Balances	896
Total [Member] \| Total [Member]
Total Loan Balances	$ 91,431
Total [Member]
Percentage of Total Loans	100.00%
Percentage of Total Loans	100.00%
Percentage of Total Loans	100.00%

Delanco Bancorp, Inc 10-Q