Activity Related to Notes (Detail) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Jan. 31, 2018 |
May 31, 2018 |
May 31, 2016 |
May 31, 2017 |
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| Debt Instrument [Line Items] | ||||
| Note repayment | $ (259,157) | $ (789,140) | ||
| 2017 Short Term Convertible Notes | ||||
| Debt Instrument [Line Items] | ||||
| Face amount of Notes | 6,038,500 | $ 1,150,000 | ||
| Unamortized discount | (92,000) | |||
| Registered direct equity offering | (5,788,500) | |||
| Note repayment | $ (259,000) | $ (250,000) | ||
| Carrying value of Notes, net | $ 1,058,000 | |||
| Short-Term Convertible Notes | ||||
| Debt Instrument [Line Items] | ||||
| Face amount of Notes | 6,300,000 | 3,981,050 | ||
| Note repayment | $ (259,000) | (789,000) | ||
| Conversions | (525,000) | |||
| Payments upon maturity | (762,250) | |||
| Short-Term Convertible Notes | Tender Offer | ||||
| Debt Instrument [Line Items] | ||||
| Conversions | $ (2,693,800) | |||
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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