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Debt - Iowa Department of Economic Development - Additional Information (Detail) (USD $)
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9 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | |
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May 31, 2014
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May 31, 2013
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Dec. 01, 2009
Iowa Department of Economic Development Loans [Member]
SecurityLoan
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May 31, 2014
Iowa Department of Economic Development Loans [Member]
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May 31, 2014
Iowa Department of Economic Development Loans [Member]
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May 31, 2014
Iowa Department of Economic Development Loans [Member]
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| Debt Instrument [Line Items] | ||||||
| Non interest bearing loans | $ 1,000,000 | |||||
| Number of monthly payments | 60 equal monthly payments | |||||
| Number of non interest bearing loans | 2 | |||||
| Loan period (in years) | 5 years | |||||
| Potentially forgivable loan amount | 1,000,000 | |||||
| Periodic repayments of loan | 16,667 | |||||
| Repayment of outstanding balance | 367,000 | 150,000 | 1,000,000 | |||
| Forgivable loan amount forgiven | 1,000,000 | |||||
| Loan forgiveness recorded as non-operating income | $ 1,000,000 | $ 1,000,000 | ||||