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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 01, 2021 USD ($) | Mar. 31, 2022 USD ($) segment | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Apr. 01, 2021 USD ($) | Nov. 20, 2020 shares
Concentration Risk [Line Items] |  |  |  |  |  |
PIPE issuance consideration | $ 427,100,000 |  |  |  |  |
Recognized net loss |  | $ (68,299,000) | $ (31,391,000) | $ (31,368,000) |  |
Recognized net loss |  | $ (68,299,000) | (31,391,000) | (31,368,000) |  |
Number of reporting segments | segment |  | 2 |  |  |  |
Warrants issued per share, percent | shares |  |  |  |  |  | 0.3333
Restricted cash |  | $ 2,282,000 | 1,453,000 | 0 |  |
Allowance for doubtful accounts |  | $ 300,000 | 100,000 |  |  |
Intangible asset, useful life |  | 3 years |  |  |  |
Impairments of long-lived assets |  | $ 0 | 0 | 0 |  |
Refund liability |  | 1,275,000 | 1,292,000 |  |  |
Sales tax payable |  | 9,163,000 | 24,164,000 |  |  |
Accrued sales taxes collected not remitted |  | 3,100,000 | 14,500,000 |  |  |
Sales tax expense |  | 600,000 | 1,200,000 | 5,000,000.0 |  |
Inventory reserve balance |  | 8,800,000 | 1,600,000 |  |  |
Advertising costs |  | 63,700,000 | 60,100,000 | 39,700,000 |  |
Material related party transaction amount |  | 0 |  |  |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Lease liability |  |  |  |  | $ 36,400,000 |
Lease right-of-use asset |  |  |  |  | $ 32,100,000 |
General and administrative |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Credit cards payment processing fees |  | 10,800,000 | 8,400,000 | 5,700,000 |  |
Fulfillment costs |  | 150,500,000 | 94,900,000 | $ 53,400,000 |  |
Accrued and Other Current Liabilities | Sales Channel, Through Intermediary |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Refund liability |  | 400,000 | 100,000 |  |  |
Subscription and Circulation | Accrued and Other Current Liabilities |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Refund liability |  | $ 900,000 | $ 1,200,000 |  |  |
Accounts Receivable | Customer Concentration Risk | Two Customers |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  | 59.00% |  |  |  |
Accounts Receivable | Customer Concentration Risk | Three Customers |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  |  | 84.00% |  |  |
Accounts Receivable | Segment Concentration Risk | Commerce |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  | 11.70% | 11.80% |  |  |
Finished Goods | Supplier Concentration Risk | Two Suppliers |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  | 27.00% | 30.00% |  |  |
Accounts Payable | Supplier Concentration Risk | Two Suppliers |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  | 26.00% | 44.00% |  |  |

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