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Operating Segment - Disclosure of Detailed Information About Segment Performance (Details) - NZD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue | $ 80,039 |  | $ 90,065 |  | $ 111,920 |
Cost of goods sold | (46,147) |  | (56,247) |  | (74,480) |
Gross profit | 33,892 |  | 33,818 |  | 37,440 |
Administrative expenses | (9,556) |  | (11,837) |  | (3,432) |
Corporate expenses | (9,350) |  | (12,772) |  | (14,145) |
Other income | 4,223 |  |  |  |  |
Other foreign exchange gain (loss) | (3,642) |  | (615) |  | (1,963) |
EBITDA | 690 |  | (16,167) |  | (25,602) |
Brand transition, restructure and transaction expenses | (22,527) |  | (14,593) |  | (10,075) |
Finance expense | (8,214) |  | (5,213) |  | (4,041) |
Interest income | 5 |  | 12 |  |  |
Income/(loss) before income tax expense | (68,212) |  | (53,523) |  | (50,494) |
Income tax expense | (134) |  | (782) |  | 1,274 |
Profit/(loss) after income tax | (68,346) |  | (54,305) |  | (49,220) |
Operating segments [Member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue from external customers | 80,039 |  | 90,065 |  | 111,920 |
Revenue | 80,039 |  | 90,065 |  | 111,920 |
Cost of goods sold | (46,147) |  | (56,247) |  | (74,480) |
Gross profit | 33,892 |  | 33,818 |  | 37,440 |
Other segment expenses | (28,880) | [1] | (35,555) | [1] | (45,454) | [2]
Administrative expenses | (856) |  | (1,234) |  | (1,050) |
Corporate expenses | (9,350) |  | (12,772) |  | (17,947) |
Other income | 4,223 |  |  |  |  |
Other foreign exchange gain (loss) | 1,661 |  | (424) |  | 1,409 |
EBITDA | 690 |  | (16,167) |  | (25,602) |
Brand transition, restructure and transaction expenses | (22,527) |  | (13,687) | [3] | (10,075) |
Finance expense | (8,214) |  | (5,213) |  | (4,041) |
Interest income | 5 |  | 12 |  |  |
Impairment expense | (4,895) |  | (8,904) |  | (8,173) |
Depreciation and amortisation | (8,700) |  | (10,603) |  | (2,382) |
Fair value gain on foreign exchange contracts |  |  | 729 |  | (1,704) |
Unrealised foreign exchange gain/(loss) | 1,981 |  | 310 |  | 2,258 |
Fair value loss on Convertible Notes derivative | (26,552) |  |  |  | (775) |
Income/(loss) before income tax expense | (68,212) |  | (53,523) |  | (50,494) |
Income tax expense | (134) |  | (782) |  | 1,274 |
Profit/(loss) after income tax | (68,346) |  | (54,305) |  | (49,220) |
Operating segments [Member] | New Zealand Retail [Member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue from external customers | 40,492 |  | 42,576 |  | 50,348 |
Revenue | 40,492 |  | 42,576 |  | 50,348 |
Cost of goods sold | (19,188) |  | (19,582) |  | (24,616) |
Gross profit | 21,304 |  | 22,994 |  | 25,732 |
Other segment expenses | (17,359) | [1] | (18,784) | [1] | (24,540) | [2]
Administrative expenses |  |  |  |  |  |
Corporate expenses |  |  |  |  |  |
Other income |  |  |  |  |  |
Other foreign exchange gain (loss) |  |  |  |  |  |
EBITDA | 3,945 |  | 4,210 |  | 1,192 |
Brand transition, restructure and transaction expenses |  |  |  | [3] |  |
Finance expense |  |  |  |  |  |
Interest income |  |  |  |  |  |
Impairment expense |  |  |  |  |  |
Depreciation and amortisation |  |  |  |  |  |
Fair value gain on foreign exchange contracts |  |  |  |  |  |
Unrealised foreign exchange gain/(loss) |  |  |  |  |  |
Fair value loss on Convertible Notes derivative |  |  |  |  |  |
Income/(loss) before income tax expense | 3,945 |  | 4,210 |  | 1,192 |
Income tax expense |  |  |  |  |  |
Profit/(loss) after income tax | 3,945 |  | 4,210 |  | 1,192 |
Operating segments [Member] | New Zealand Wholesale [Member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue from external customers | 7,496 |  | 15,554 |  | 29,439 |
Revenue | 7,496 |  | 15,554 |  | 29,439 |
Cost of goods sold | (4,636) |  | (11,342) |  | (24,582) |
Gross profit | 2,860 |  | 4,211 |  | 4,857 |
Other segment expenses | (1,425) | [1] | (3,112) | [1] | (9,667) | [2]
Administrative expenses |  |  |  |  |  |
Corporate expenses |  |  |  |  |  |
Other income |  |  |  |  |  |
Other foreign exchange gain (loss) |  |  |  |  |  |
EBITDA | 1,435 |  | 1,099 |  | (4,810) |
Brand transition, restructure and transaction expenses |  |  |  | [3] |  |
Finance expense |  |  |  |  |  |
Interest income |  |  |  |  |  |
Impairment expense |  |  |  |  |  |
Depreciation and amortisation |  |  |  |  |  |
Fair value gain on foreign exchange contracts |  |  |  |  |  |
Unrealised foreign exchange gain/(loss) |  |  |  |  |  |
Fair value loss on Convertible Notes derivative |  |  |  |  |  |
Income/(loss) before income tax expense | 1,435 |  | 1,099 |  | (4,810) |
Income tax expense |  |  |  |  |  |
Profit/(loss) after income tax | 1,435 |  | 1,099 |  | (4,810) |
Operating segments [Member] | E-Commerce [Member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue from external customers | 32,051 |  | 31,935 |  | 32,133 |
Revenue | 32,051 |  | 31,935 |  | 32,133 |
Cost of goods sold | (21,604) |  | (20,916) |  | (21,248) |
Gross profit | 10,447 |  | 11,020 |  | 10,885 |
Other segment expenses | (10,096) | [1] | (13,659) | [1] | (11,247) | [2]
Administrative expenses |  |  |  |  |  |
Corporate expenses |  |  |  |  |  |
Other income |  |  |  |  |  |
Other foreign exchange gain (loss) |  |  |  |  |  |
EBITDA | 351 |  | (2,639) |  | (362) |
Brand transition, restructure and transaction expenses |  |  |  | [3] |  |
Finance expense |  |  |  |  |  |
Interest income |  |  |  |  |  |
Impairment expense |  |  |  |  |  |
Depreciation and amortisation |  |  |  |  |  |
Fair value gain on foreign exchange contracts |  |  |  |  |  |
Unrealised foreign exchange gain/(loss) |  |  |  |  |  |
Fair value loss on Convertible Notes derivative |  |  |  |  |  |
Income/(loss) before income tax expense | 351 |  | (2,639) |  | (362) |
Income tax expense |  |  |  |  |  |
Profit/(loss) after income tax | 351 |  | (2,639) |  | (362) |
Operating segments [Member] | Unallocated [member] |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |
Revenue from external customers |  |  |  |  |  |
Revenue |  |  |  |  |  |
Cost of goods sold | (719) |  | (4,407) |  | (4,034) |
Gross profit | (719) |  | (4,407) |  | (4,034) |
Other segment expenses |  | [1] |  | [1] |  | [2]
Administrative expenses | (856) |  | (1,234) |  | (1,050) |
Corporate expenses | (9,350) |  | (12,772) |  | (17,947) |
Other income | 4,223 |  |  |  |  |
Other foreign exchange gain (loss) | 1,661 |  | (424) |  | 1,409 |
EBITDA | (5,041) |  | (18,837) |  | (21,622) |
Brand transition, restructure and transaction expenses | (22,527) |  | (13,687) | [3] | (10,075) |
Finance expense | (8,214) |  | (5,213) |  | (4,041) |
Interest income | 5 |  | 12 |  |  |
Impairment expense | (4,895) |  | (8,904) |  | (8,173) |
Depreciation and amortisation | (8,700) |  | (10,603) |  | (2,382) |
Fair value gain on foreign exchange contracts |  |  | 729 |  | (1,704) |
Unrealised foreign exchange gain/(loss) | 1,981 |  | 310 |  | 2,258 |
Fair value loss on Convertible Notes derivative | (26,552) |  |  |  | (775) |
Income/(loss) before income tax expense | (73,943) |  | (56,193) |  | (46,514) |
Income tax expense | (134) |  | (782) |  | 1,274 |
Profit/(loss) after income tax | $ (74,077) |  | $ (56,975) |  | $ (45,240) |
[1] | Other segment expenses relate to brand management expenses.
[2] | Other segment expenses relate to brand management expenses and some corporate expenses.
[3] | Brand transition, restructure and transaction expenses are shown net of proceeds from the sale of Naked brand and trademarks.

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