Long-Term Debt (Details) (USD $)			3 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended		3 Months Ended	1 Months Ended
	Jul. 31, 2014	Jul. 31, 2014 Senior Secured Credit Facility [Member] Prime Rate [Member]	Jul. 31, 2014 Senior Secured Credit Facility [Member] LIBOR [Member]	Jan. 08, 2010 Wells Fargo Bank [Member] Mortgage 1 [Member]	Jul. 31, 2014 Wells Fargo Bank [Member] Mortgage 1 [Member]	Jan. 08, 2010 Wells Fargo Bank [Member] Mortgage 1 [Member]	Oct. 24, 2013 Wells Fargo Bank [Member] Mortgage 2 [Member]	Jul. 31, 2014 Wells Fargo Bank [Member] Mortgage 2 [Member]	Oct. 24, 2013 Wells Fargo Bank [Member] Mortgage 2 [Member]	Jul. 31, 2014 Wells Fargo Bank [Member] Senior Secured Credit Facility [Member]	Aug. 31, 2014 Subsequent Event [Member] Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured credit facility credit limit										$ 30,000,000
Initial expiration date										Sep. 30, 2013
Extended Term Of Senior Secured Credit Facility											3 years
Equity ownership in foreign entities pledged as collateral, percentage	65.00%
Effective interest rate		3.25%	2.75%
Additional interest rate			2.50%
Outstanding balance under the credit facility	22,921,454
Unused availability under the credit facility	7,078,546
Mortgage agreement, amount				2,500,000			1,275,000
Mortgage agreement, amount repaid							4,250
Mortgage agreement, interest rate				6.42%			4.50%
Mortgage agreement, amount due						2,000,000			1,030,000
Mortgage agreement, maturity date				Jan. 08, 2015			Oct. 01, 2018
Outstanding amount					$ 2,050,018			$ 1,236,750
Debt, amortization period					60 months			60 months