Regulatory Matters and Regulatory Capital (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Total capital to risk-weighted assets:
Actual, amount	$ 71,190		$ 57,968
Actual, ratio	13.04%		9.54%
For capital adequacy purposes, ratio	8.00%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	10.00%		10.00%
Tier I capital to risk-weighted assets:
Actual, amount	64,303		50,292
Actual, ratio	11.78%		8.28%
For capital adequacy purposes, ratio	4.00%	9.00%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	6.00%		6.00%
Tier I leverage to average assets:
Actual, amount	64,303		50,292
Actual, ratio	8.43%		6.59%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	5.00%		5.00%
Minimum [Member]
Total capital to risk-weighted assets:
For capital adequacy purposes, amount	43,687		48,605
For capital adequacy purposes, ratio	8.00%		8.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	54,609		60,757
Tier I capital to risk-weighted assets:
For capital adequacy purposes, amount	21,844		24,303
For capital adequacy purposes, ratio	4.00%		4.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	32,766		36,454
Tier I leverage to average assets:
For capital adequacy purposes, amount	30,507		30,514
For capital adequacy purposes, ratio	4.00%		4.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	38,134		38,143
Advantage [Member]
Total capital to risk-weighted assets:
Actual, amount	69,189		55,513
Actual, ratio	12.68%		9.14%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	10.00%		10.00%
Tier I capital to risk-weighted assets:
Actual, amount	62,302		47,837
Actual, ratio	11.42%		7.88%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	6.00%		6.00%
Tier I leverage to average assets:
Actual, amount	62,302		47,837
Actual, ratio	8.19%		6.29%
To be ''well-capitalized'' under prompt corrective action provisions, ratio	5.00%		5.00%
Advantage [Member] | Minimum [Member]
Total capital to risk-weighted assets:
For capital adequacy purposes, amount	43,658		48,577
For capital adequacy purposes, ratio	8.00%		8.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	54,572		60,721
Tier I capital to risk-weighted assets:
For capital adequacy purposes, amount	21,829		24,289
For capital adequacy purposes, ratio	4.00%		4.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	32,743		36,432
Tier I leverage to average assets:
For capital adequacy purposes, amount	30,436		30,445
For capital adequacy purposes, ratio	4.00%		4.00%
To be ''well-capitalized'' under prompt corrective action provisions, amount	$ 38,045		$ 38,056