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Bank Loan - Additional Information (Detail) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Oct. 26, 2012 | Sep. 30, 2013 Installment | Sep. 30, 2012
Debt Instrument [Line Items] |  |  |  |
Additional borrowings |  | $ 16,300,000 |  |
Long-term loan outstanding principal balance |  | 1,900,000 | 16,866,667 | 1,900,000
Total loan amount after amendment |  | 18,400,000 |  |
Monthly payments |  |  | 59 Months |
Number of monthly installment payable |  |  | 59 |
Required monthly loan principal repayment |  |  | 153,333 |
Effective interest rate Current |  |  | 3.25% |
Spread on reference rate |  |  | 0.75% |
Effective interest rate on debt |  |  | 4.00% |
Final installment date |  |  | Oct. 26, 2017 |
Amortized loan costs | 250,000 |  | 250,000 |
Amortized cost on straight-line basis in months | 60 months |  | 60 months |
Unamortized loan cost |  |  | 200,000 |
Adjustment made to loan for loan modification or exchange |  | 0 |  |
Amortization expenses |  |  | 44,956 | 6,295
Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term loan outstanding principal balance |  |  | $ 30,000,000 |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + Details
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