Summary of Significant Accounting Policies - Summary of change to consolidated balance sheet (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Consolidated Balance Sheet
Finance receivables, net	$ 249,825,801	$ 241,253,430
Deferred income taxes	8,426,961	9,123,300
Retained earnings	96,933,548	106,837,118
Reported
Consolidated Balance Sheet
Finance receivables, net		242,348,521
Deferred income taxes		8,704,099
Retained earnings		107,513,008
Correction
Consolidated Balance Sheet
Finance receivables, net		(1,095,091)
Deferred income taxes		419,201
Retained earnings		$ (675,890)

The cumulative amount of the reporting entity's undistributed earnings or deficit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.31(a)(3))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant