Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) (Finance receivables, USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Balance Outstanding	$ 410,717,491	$ 395,721,730
Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Balance Outstanding	400,093,559	386,940,093	388,783,924
31 - 60 days	15,756,362		15,310,139
31 - 60 days (in percentage)	3.94%		3.94%
61 - 90 days	3,239,528		3,879,087
61 - 90 days (in percentage)	0.81%		1.00%
Over 90 days	3,767,037		1,739,015
Over 90 days (in percentage)	0.94%		0.44%
Total	22,762,927		20,928,241
Total (in percentage)	5.69%		5.38%
Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Balance Outstanding	10,623,932	5,721,768	8,075,902
31 - 60 days	104,983		94,770
31 - 60 days (in percentage)	0.99%		1.17%
61 - 90 days	37,604		6,822
61 - 90 days (in percentage)	0.35%		0.08%
Over 90 days	30,877		11,024
Over 90 days (in percentage)	0.29%		0.14%
Total	$ 173,464		$ 112,616
Total (in percentage)	1.63%		1.39%