Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	May 31, 2013 Customer	May 31, 2012 Customer
Summary of Significant Accounting Policies (Textual)
Number of bank accounts	4
Accounts receivable with largest customers	$ 1,920,000	$ 1,802,000
Number of operating segments	1
Revenues [Member]
Summary of Significant Accounting Policies (Textual)
Number of customers	4	2
Revenues [Member] | Customer Concentration Risk [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	52.10%	24.60%
Largest, concentration risk	16.10%	13.90%
Accounts Receivable [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk	21.00%
Number of bank accounts	57