DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)					3 Months Ended			4 Months Ended		12 Months Ended
	Dec. 09, 2021 USD ($)	Dec. 08, 2021 USD ($) shares	Aug. 04, 2021 USD ($)	Jun. 13, 2021 shares	Mar. 31, 2022 USD ($) segment shares		Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($) shares		Dec. 31, 2021 USD ($)		Jan. 01, 2022 USD ($)
Subsidiary, Sale of Stock [Line Items]
Reverse recapitalization, aggregate consideration		$ 550,000,000
Cash and cash equivalents					$ 69,935,000		$ 22,476,000	$ 69,935,000		$ 105,027,000
Restricted cash					2,768,000			2,768,000		2,768,000
Net loss					(36,211,000)		(14,205,000)
Net cash used in operating activities					$ (36,352,000)		(6,258,000)
Number of reportable segments | segment					2
Allowance for doubtful accounts					$ 157,000			157,000		96,000
Cash, FDIC insured amount					250,000			250,000
Inventory write-down					0		0
Deferred costs					0			0
Forward purchase receivable		$ 65,062,000			58,184,000			58,184,000		60,050,000
Number of shares issued (in shares) | shares		3,250,000		3,250,000
Amortization of debt discount					423,000		0
Interest expense					3,023,000		112,000
Recapitalization exchange ratio	0.9498
Employer contributions					$ 0		0
Expected dividend yield					0.00%
Delivery costs					$ 40,531,000		35,929,000
Research and development expense					476,000		476,000
Advertising expense					11,695,000		5,707,000
Future advertising expenses					1,390,000			1,390,000		78,000
Operating lease assets					10,520,000	[1]		10,520,000	[1]	0	[1]	$ 11,298,000
Present value of lease liabilities					10,974,000			10,974,000				11,742,000
Deferred rent and incentive balances												$ 444,000
Trade Accounts Receivable
Subsidiary, Sale of Stock [Line Items]
Receivables					2,177,000			$ 2,177,000		$ 2,318,000
Outbound delivery fees
Subsidiary, Sale of Stock [Line Items]
Delivery costs					$ 7,272,000		$ 6,633,000
Common Class A | ACM
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares) | shares					233,593			734,702
Software and Software Development Costs
Subsidiary, Sale of Stock [Line Items]
Useful life					4 years
Largest Customer | Accounts Receivable | Customer Concentration Risk
Subsidiary, Sale of Stock [Line Items]
Concentration risk, percentage					31.60%					40.90%
Line of Credit | Secured Debt
Subsidiary, Sale of Stock [Line Items]
Aggregate principal amount			$ 45,000,000
Debt instrument covenant, minimum unrestricted cash balance			$ 15,000,000
Debt instrument covenant, retail gross margin percentage			8.00%
Max Delivery LLC
Subsidiary, Sale of Stock [Line Items]
Cash consideration	$ 4,000,000
Equity consideration	3,000,000
Contingent consideration	$ 1,711,000

[1] Figures as of March 31, 2022 reflect the Company’s January 1, 2022 adoption of Accounting Standards Update (“ASU”) No. 2016-02, Leases. For additional details, see Note 1.