| Income Tax Disclosure [Abstract] | Period [Axis] |
|---|
2015-05-01 - 2016-04-30 |
|---|
Income Tax Disclosure [Abstract] | |
Income Tax Expense | The income tax expense is comprised as follows: | | | | | | | | | | | | | | For the year ended | | April 30, 2014 | | April 30, 2015 | | April 30, 2016 | Current income tax expense: | | | | | | Cayman Islands | $ | — |
| | $ | — |
| | $ | — |
| Foreign | (21,669 | ) | | (20,595 | ) | | (10,881 | ) | | (21,669 | ) | | (20,595 | ) | | (10,881 | ) | Deferred income tax expense: | | | | | | Cayman Islands | — |
| | — |
| | — |
| Foreign | (6,705 | ) | | (4,012 | ) | | 1,375 |
| | (6,705 | ) | | (4,012 | ) | | 1,375 |
| Income tax expense | $ | (28,374 | ) | | $ | (24,607 | ) | | $ | (9,506 | ) |
|
Components of Loss from Continuing Operations Before Income Tax | The components of loss before income tax are comprised as follows: | | | | | | | | | | | | | | For the year ended | | April 30, 2014 | | April 30, 2015 | | April 30, 2016 | Cayman Islands | $ | 79,681 |
| | $ | (299,502 | ) | | $ | 29,670 |
| Foreign | (222,226 | ) | | (470,651 | ) | | (457,950 | ) | | $ | (142,545 | ) | | $ | (770,153 | ) | | $ | (428,280 | ) |
|
Summary of Income Tax Expense | As we operate in several tax jurisdictions, our income is subject to various rates of taxation. The income tax expense differs from the amount that would have resulted from applying the Cayman Islands statutory income tax rates to loss before income taxes as follows: | | | | | | | | | | | | | | For the year ended | | April 30, 2014 | | April 30, 2015 | | April 30, 2016 | Loss before income tax | $ | (142,545 | ) | | $ | (770,153 | ) | | $ | (428,280 | ) | Cayman Islands statutory income tax rate | — | % | | — | % | | — | % | Income tax recovery calculated at statutory rate | — |
| | — |
| | — |
| (Increase) decrease in income tax expense resulting from: | | | | | | Foreign income and withholding taxes | (20,682 | ) | | (21,429 | ) | | (11,828 | ) | Change in valuation allowance position | (7,792 | ) | | (793 | ) | | 181 |
| Adjustments to prior years | — |
| | (2,387 | ) | | 2,169 |
| Other | 100 |
| | 2 |
| | (28 | ) | Income tax expense | $ | (28,374 | ) | | $ | (24,607 | ) | | $ | (9,506 | ) |
|
Deferred Income Tax Assets and Deferred Income Tax Liabilities | The tax effects of temporary differences that give rise to significant portions of deferred income tax assets and deferred income tax liabilities are presented below: | | | | | | | | | | 2015 | | 2016 | Deferred income taxes: | | | | Pension and other employee benefits | $ | 26,950 |
| | $ | 24,279 |
| Losses carried forward | 315,752 |
| | 257,054 |
| Deferred capital gains and deferred revenue | (48,769 | ) | | 13,136 |
| Valuation allowance and other | (301,154 | ) | | (300,674 | ) | Net deferred income tax liability | $ | (7,221 | ) | | $ | (6,205 | ) |
|
Summary of Valuation Allowance | Most of the temporary differences noted above were reduced by valuation allowances resulting in the net deferred income tax liabilities as follows: | | | | | | | | | | 2015 | | 2016 | Distributed as follows: | | | | Current deferred income tax assets | $ | 416 |
| | $ | — |
| Current deferred income tax liabilities | (43 | ) | | — |
| Long-term deferred income tax assets | 1,333 |
| | 2,570 |
| Long-term deferred income tax liabilities | (8,927 | ) | | (8,775 | ) | | $ | (7,221 | ) | | $ | (6,205 | ) |
|
Non-Capital Loss Carry Forwards Expiration | These non-capital loss carry forwards expire as follows: | | | | | | | | | | | | | | | | | | | | | | | | 2018 | | 2019 | | 2020 and thereafter | | No expiry date | | Total | Tax losses (i): | | | | | | | | | | | Africa | | $ | — |
| | $ | — |
| | $ | — |
| | $ | 8,048 |
| | $ | 8,048 |
| Australia | | — |
| | — |
| | — |
| | 41,621 |
| | 41,621 |
| Brazil | | — |
| | — |
| | — |
| | 122,975 |
| | 122,975 |
| Canada | | — |
| | — |
| | 166,715 |
| | — |
| | 166,715 |
| Ireland | | — |
| | — |
| | — |
| | 21,962 |
| | 21,962 |
| Luxembourg | | — |
| | — |
| | — |
| | 17,574 |
| | 17,574 |
| Netherlands | | — |
| | — |
| | 20,063 |
| | — |
| | 20,063 |
| Nigeria (ii) | | — |
| | — |
| | — |
| | 11,240 |
| | 11,240 |
| Norway | | — |
| | — |
| | — |
| | 349,215 |
| | 349,215 |
| Poland | | 1,888 |
| | 2,004 |
| | 3,428 |
| | — |
| | 7,320 |
| United Kingdom | | — |
| | — |
| | — |
| | 140,301 |
| | 140,301 |
| United States | | — |
| | — |
| | 56,033 |
| | — |
| | 56,033 |
| Other | | — |
| | — |
| | 12,827 |
| | 12,336 |
| | 25,163 |
| | | $ | 1,888 |
| | $ | 2,004 |
| | $ | 259,066 |
| | $ | 725,272 |
| | $ | 988,230 |
|
| | (i) | Represents the gross amount of tax loss carry forwards translated at closing exchange rates at April 30, 2016. Tax loss carry forwards in certain jurisdictions are subject to audit and the table above reflects our best estimate of the outcomes at the balance sheet date. |
| | (ii) | On June 16, 2016, we terminated our agreement with the Nigerian Company and as a result we will deconsolidate Atlantic Aviation Limited and Atlantic Aviation FZE during the fiscal year ended April 30, 2017. The associated tax losses of these entities will not be available to us. |
|
Summary Activity of Total Amounts of Unrecognized Tax Benefits | The following table summarizes activity of the total amounts of unrecognized tax benefits: | | | | | | | | | | | | | | For the year ended | | April 30, 2014 | | April 30, 2015 | | April 30, 2016 | Opening balance | $ | 24,281 |
| | $ | 25,475 |
| | $ | 29,435 |
| Additions in the current year | 5,187 |
| | 6,714 |
| | 3,077 |
| Reductions in current year | (3,117 | ) | | — |
| | (734 | ) | Foreign exchange | (876 | ) | | (2,754 | ) | | (2,196 | ) | Total | $ | 25,475 |
| | $ | 29,435 |
| | $ | 29,582 |
|
|
Summary Information Regarding Income Tax Related Interest and Penalties | The following table summarizes information regarding income tax related interest and penalties: | | | | | | | | | | | | | | For the year ended | | April 30, 2014 | | April 30, 2015 | | April 30, 2016 | Net increase in interest and penalties | $ | 2,587 |
| | $ | 2,243 |
| | $ | 862 |
|
|