Warrant Transaction Agreements - Walmart Stores, Inc. Transaction Agreement (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Jul. 20, 2017 USD ($) installment D $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2020 shares	Jul. 31, 2017 shares
Warrant Transaction Agreements
Provision compared for common stock warrants		$ 33,635	$ 25,028	$ 38,698
Warrants issued with the Walmart Stores, Inc transaction agreement
Warrant Transaction Agreements
Shares of common stock that can be purchased from warrants issued (in shares) | shares						55,286,696
Warrant shares vested (in shares) | shares		40,010,108	34,917,912
Contract asset		$ 2,600
Provision compared for common stock warrants		$ 19,600	$ 5,900	$ 7,100
Warrants issued with the Walmart Stores, Inc transaction agreement | Tranche one
Warrant Transaction Agreements
Reduction in revenue	$ 10,900
Warrant shares vested (in shares) | shares					5,819,652
Warrants issued with the Walmart Stores, Inc transaction agreement | Tranche two
Warrant Transaction Agreements
Cash payments to be received under agreement	$ 50,000
Warrant shares vested (in shares) | shares	29,098,260
Number of installments | installment	4
Number of shares per installment | shares	7,274,565
Warrants issued with the Walmart Stores, Inc transaction agreement | Warrants Tranches one And two
Warrant Transaction Agreements
Cash payments to be received under agreement	$ 200,000
Exercise price of warrants (in dollars per share) | $ / shares	$ 2.1231
Warrants issued with the Walmart Stores, Inc transaction agreement | Tranche three
Warrant Transaction Agreements
Cash payments to be received under agreement	$ 400,000
Warrant shares vested (in shares) | shares	20,368,784
Warrant percentage weighted average share price	90.00%
Threshold trading days | D	30
Number of installments | installment	8
Number of shares per installment | shares	2,546,098
Cash receipt per installment	$ 50,000
Exercise price of warrants (in dollars per share) | $ / shares	$ 6.28
Walmart | Warrants issued with the Walmart Stores, Inc transaction agreement
Warrant Transaction Agreements
Number of warrants exercised (in shares) | shares		13,094,217	13,094,217
Maximum | Warrants issued with the Walmart Stores, Inc transaction agreement
Warrant Transaction Agreements
Shares of common stock that can be purchased from warrants issued (in shares) | shares	55,286,696
Cash payments to be received under agreement	$ 600,000
Maximum | Warrants issued with the Walmart Stores, Inc transaction agreement | Tranche two
Warrant Transaction Agreements
Cash payments to be received under agreement	$ 200,000