Credit Facility (Details) (USD $)		3 Months Ended			3 Months Ended	0 Months Ended	1 Months Ended
	Oct. 31, 2008 Credit facility	Jun. 30, 2013 Revolving Line of Credit	Jun. 30, 2012 Revolving Line of Credit	Oct. 31, 2008 Revolving Line of Credit	Jun. 30, 2013 Revolving Line of Credit Maximum	Oct. 31, 2008 Bank Term Note	Jun. 30, 2012 Bank Term Note
Revolving Line of Credit
Maximum borrowing capacity	$ 19,500,000			$ 12,000,000
Term of debt instrument		2 years				48 months
Principal amount						7,500,000
Early termination fees							0
Prime rate at the end of the period (as a percent)		3.25%
Monthly interest rate basis					prime rate
Basis points added to reference rate (as a percent)					0.25%
Unused line fee (as a percent)		0.25%
Amount outstanding		$ 0	$ 0