Fair Value Measurements - Warrant Derivative Liability (Activity in Level 3) (Details) |
12 Months Ended |
|---|---|
|
Apr. 30, 2017
USD ($)
| |
| Fair Value Disclosures [Abstract] | |
| Balance April 30, 2016 | |
| Initial valuation of warrant derivative liability | 52,500 |
| Change in valuation of warrant derivative liability | |
| Balance April 30, 2017 | $ 52,500 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|