NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Policies)	6 Months Ended
Aug. 02, 2020
Accounting Policies [Abstract]
Basis of presentation	Basis of presentationThe unaudited interim consolidated financial statements as of August 2, 2020 and for the quarters and two quarters ended August 2, 2020 and August 4, 2019 are presented in United States dollars and have been prepared by the Company under the rules and regulations of the Securities and Exchange Commission ("SEC"). The financial information is presented in accordance with United States generally accepted accounting principles ("GAAP") for interim financial information and, accordingly, does not include all of the information and footnotes required by GAAP for complete financial statements. The financial information as of February 2, 2020 is derived from the Company's audited consolidated financial statements and related notes for the fiscal year ended February 2, 2020, which are included in Item 8 in the Company's fiscal 2019 Annual Report on Form 10-K filed with the SEC on March 26, 2020. These unaudited interim consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. These unaudited interim consolidated financial statements should be read in conjunction with the Company's consolidated financial statements and related notes included in Item 8 in the Company's fiscal 2019 Annual Report on Form 10-K.
Fiscal period	The Company's fiscal year ends on the Sunday closest to January 31 of the following year, typically resulting in a 52-week year, but occasionally giving rise to an additional week, resulting in a 53-week year. Fiscal 2020 will end on January 31, 2021 and will be a 52-week year. Fiscal 2019 was a 52-week year. The Company's business is affected by the pattern of seasonality common to most retail apparel businesses. Historically, the Company has recognized a significant portion of its operating profit in the fourth fiscal quarter of each year as a result of increased net revenue during the holiday season.
Reclassification	Certain comparative figures have been reclassified to conform to the financial presentation adopted for the current year.
Business combinations	Business combinationsThe purchase price of an acquisition is measured as the aggregate of the fair value of the consideration transferred including the acquisition-date fair value of the Company's previously held equity interests. The purchase price is allocated to the fair values of the tangible and intangible assets acquired and liabilities assumed, with any excess recorded as goodwill. These fair value determinations require judgment and may involve the use of significant estimates and assumptions. The purchase price allocation may be provisional during a measurement period of up to one year to provide reasonable time to obtain the information necessary to identify and measure the assets acquired and liabilities assumed. Any such measurement period adjustments are recognized in the period in which the adjustment amount is determined. Transaction costs associated with the acquisition are expensed as incurred.
Goodwill and intangible assets	Goodwill and intangible assets Acquired finite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives, and are reviewed for impairment when events or circumstances indicate that the asset group to which the intangible assets belong might be impaired. The Company revises the estimated remaining useful life of these assets when events or changes in circumstances warrant a revision. If the Company revises the useful life, the unamortized balance is amortized over the remaining useful life on a prospective basis. Goodwill represents the excess of the aggregate of the consideration transferred over the net assets acquired and liabilities assumed and is tested annually for impairment, or more frequently if there are indicators of impairment.
Revenue recognition	MIRROR generates net revenue from the sale of in-home fitness equipment and associated content subscriptions. Certain in-home fitness contracts contain multiple performance obligations, including hardware and a subscription service commitment. For customer contracts that contain multiple performance obligations the Company accounts for individual performance obligations if they are distinct. The transaction price is allocated to each performance obligation based on its standalone selling price.
Recently adopted and issued accounting pronouncements	Recently adopted accounting pronouncements In June 2016, the FASB issued guidance on ASC 326 "Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments". This guidance changes the impairment model for most financial assets and requires the use of a forward-looking expected loss model rather than incurred losses for instruments measured at amortized cost. Under this model, entities are required to estimate the lifetime expected credit loss on such instruments and record an allowance to offset the amortized cost basis of the financial asset, resulting in a net presentation of the amount expected to be collected on the financial asset. The Company adopted this update during the first quarter of fiscal 2020 and it did not have a material impact on the Company's consolidated financial statements. Recently issued accounting pronouncements In December 2019, the FASB issued guidance on ASC 740, "Income Taxes". The amendments in this update simplify the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application and simplify GAAP for other areas of this topic by clarifying and amending existing guidance. This guidance is effective for the Company beginning in its first quarter of fiscal 2021 and early adoption is permitted. The Company is currently evaluating the impact that this new guidance may have on its consolidated financial statements but does not believe it will have a material impact. In March 2020, the FASB released guidance on ASC 848, "Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting". This update provides optional expedients and exceptions to the current guidance on contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this update apply only to contracts and hedging relationships that reference the London Interbank Offered Rate ("LIBOR") or another reference rate expected to be discontinued due to reference rate reform. The guidance was effective upon issuance and generally can be applied to applicable contract modifications through December 31, 2022. The Company is currently evaluating the impact that this new guidance may have on its consolidated financial statements but does not believe it will have a material impact.
Fair value measurement	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are made using a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value: •Level 1 - defined as observable inputs such as quoted prices in active markets; •Level 2 - defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and •Level 3 - defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The Company records accounts receivable, accounts payable, and accrued liabilities at cost. The carrying values of these instruments approximate their fair value due to their short-term maturities. The Company has short-term, highly liquid investments classified as cash equivalents, which are invested in money market funds, Treasury bills, and term deposits. The Company records cash equivalents at their original purchase prices plus interest that has accrued at the stated rate. The fair values of the forward currency contract assets and liabilities are determined using observable Level 2 inputs, including foreign currency spot exchange rates, forward pricing curves, and interest rates. The fair values consider the credit risk of the Company and its counterparties. The Company's Master International Swap Dealers Association, Inc., Agreements and other similar arrangements allow net settlements under certain conditions. However, the Company records all derivatives on its consolidated balance sheets at fair value and does not offset derivative assets and liabilities.
Cost of goods sold	The cost of digital content subscription services, including the costs of content creation, studio overhead, and related production departments is recorded in costs of goods sold.

NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Policies)

6 Months Ended

Aug. 02, 2020

Basis of presentationThe unaudited interim consolidated financial statements as of August 2, 2020 and for the quarters and two quarters ended August 2, 2020 and August 4, 2019 are presented in United States dollars and have been prepared by the Company under the rules and regulations of the Securities and Exchange Commission ("SEC"). The financial information is presented in accordance with United States generally accepted accounting principles ("GAAP") for interim financial information and, accordingly, does not include all of the information and footnotes required by GAAP for complete financial statements. The financial information as of February 2, 2020 is derived from the Company's audited consolidated financial statements and related notes for the fiscal year ended February 2, 2020, which are included in Item 8 in the Company's fiscal 2019 Annual Report on Form 10-K filed with the SEC on March 26, 2020. These unaudited interim consolidated financial statements reflect all adjustments which are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. These unaudited interim consolidated financial statements should be read in conjunction with the Company's consolidated financial statements and related notes included in Item 8 in the Company's fiscal 2019 Annual Report on Form 10-K.

Fiscal period

The Company's fiscal year ends on the Sunday closest to January 31 of the following year, typically resulting in a 52-week year, but occasionally giving rise to an additional week, resulting in a 53-week year. Fiscal 2020 will end on January 31, 2021 and will be a 52-week year. Fiscal 2019 was a 52-week year.

The Company's business is affected by the pattern of seasonality common to most retail apparel businesses. Historically, the Company has recognized a significant portion of its operating profit in the fourth fiscal quarter of each year as a result of increased net revenue during the holiday season.

Reclassification

Certain comparative figures have been reclassified to conform to the financial presentation adopted for the current year.

Business combinations

Business combinationsThe purchase price of an acquisition is measured as the aggregate of the fair value of the consideration transferred including the acquisition-date fair value of the Company's previously held equity interests. The purchase price is allocated to the fair values of the tangible and intangible assets acquired and liabilities assumed, with any excess recorded as goodwill. These fair value determinations require judgment and may involve the use of significant estimates and assumptions. The purchase price allocation may be provisional during a measurement period of up to one year to provide reasonable time to obtain the information necessary to identify and measure the assets acquired and liabilities assumed. Any such measurement period adjustments are recognized in the period in which the adjustment amount is determined. Transaction costs associated with the acquisition are expensed as incurred.

Goodwill and intangible assets

Acquired finite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives, and are reviewed for impairment when events or circumstances indicate that the asset group to which the intangible assets belong might be impaired. The Company revises the estimated remaining useful life of these assets when events or changes in circumstances warrant a revision. If the Company revises the useful life, the unamortized balance is amortized over the remaining useful life on a prospective basis.

Goodwill represents the excess of the aggregate of the consideration transferred over the net assets acquired and liabilities assumed and is tested annually for impairment, or more frequently if there are indicators of impairment.

Revenue recognition

MIRROR generates net revenue from the sale of in-home fitness equipment and associated content subscriptions. Certain in-home fitness contracts contain multiple performance obligations, including hardware and a subscription service commitment. For customer contracts that contain multiple performance obligations the Company accounts for individual performance obligations if they are distinct. The transaction price is allocated to each performance obligation based on its standalone selling price.

Recently adopted and issued accounting pronouncements

Recently adopted accounting pronouncements

In June 2016, the FASB issued guidance on ASC 326 "Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments". This guidance changes the impairment model for most financial assets and requires the use of a forward-looking expected loss model rather than incurred losses for instruments measured at amortized cost. Under this model, entities are required to estimate the lifetime expected credit loss on such instruments and record an allowance to offset the amortized cost basis of the financial asset, resulting in a net presentation of the amount expected to be collected on the financial asset. The Company adopted this update during the first quarter of fiscal 2020 and it did not have a material impact on the Company's consolidated financial statements.

Recently issued accounting pronouncements

In December 2019, the FASB issued guidance on ASC 740, "Income Taxes". The amendments in this update simplify the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application and simplify GAAP for other areas of this topic by clarifying and amending existing guidance. This guidance is effective for the Company beginning in its first quarter of fiscal 2021 and early adoption is permitted. The Company is currently evaluating the impact that this new guidance may have on its consolidated financial statements but does not believe it will have a material impact.

In March 2020, the FASB released guidance on ASC 848, "Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting". This update provides optional expedients and exceptions to the current guidance on contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this update apply only to contracts and hedging relationships that reference the London Interbank Offered Rate ("LIBOR") or another reference rate expected to be discontinued due to reference rate reform. The guidance was effective upon issuance and generally can be applied to applicable contract modifications through December 31, 2022. The Company is currently evaluating the impact that this new guidance may have on its consolidated financial statements but does not believe it will have a material impact.

Fair value measurement

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are made using a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value:

•Level 1 - defined as observable inputs such as quoted prices in active markets;

•Level 2 - defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and

•Level 3 - defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The Company records accounts receivable, accounts payable, and accrued liabilities at cost. The carrying values of these instruments approximate their fair value due to their short-term maturities.

The Company has short-term, highly liquid investments classified as cash equivalents, which are invested in money market funds, Treasury bills, and term deposits. The Company records cash equivalents at their original purchase prices plus interest that has accrued at the stated rate.

The fair values of the forward currency contract assets and liabilities are determined using observable Level 2 inputs, including foreign currency spot exchange rates, forward pricing curves, and interest rates. The fair values consider the credit risk of the Company and its counterparties. The Company's Master International Swap Dealers Association, Inc., Agreements and other similar arrangements allow net settlements under certain conditions. However, the Company records all derivatives on its consolidated balance sheets at fair value and does not offset derivative assets and liabilities.

Cost of goods sold

The cost of digital content subscription services, including the costs of content creation, studio overhead, and related production departments is recorded in costs of goods sold.