Stockholders' Equity, Convertible Preferred Stock and Redeemable Non-controlling Interest - Additional Information (Details) $ / shares in Units, $ in Thousands, ¥ in Millions			3 Months Ended							9 Months Ended
	Jun. 30, 2021 shares	Feb. 26, 2021 USD ($)	Sep. 30, 2021 USD ($) vote $ / shares shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Sep. 30, 2020 shares	Jun. 30, 2020 USD ($) shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2020 CNY (¥) shares	Sep. 30, 2021 USD ($) installment vote $ / shares shares	Sep. 30, 2021 CNY (¥) installment shares	Sep. 30, 2020 shares	Sep. 30, 2021 CNY (¥) vote shares	Aug. 12, 2021 USD ($)	Dec. 31, 2020 $ / shares shares
Stockholders Equity [Line Items]
Common stock, shares authorized (in shares)			1,500,000,000							1,500,000,000			1,500,000,000		1,500,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.001							$ 0.001					$ 0.001
Aggregate offering price | $		$ 150,000
Common stock, share price calculated as a percentage of market price		3.00%
Proceeds from issuance of stock | $			$ 17,700							$ 145,500
Commission and transaction fees | $			$ 500							$ 4,500
Share percentage of Market Price, option one	95.00%			95.00%
Share percentage of Market Price, option two	96.00%			96.00%
Common stock issuance | $					$ 53,407		$ 32,502	$ 1,000
Common stock issuance for professional fees (in shares)						300,000						1,200,000
Convertible preferred stock
Stockholders Equity [Line Items]
Preferred stock, shares authorized (in shares)			50,000,000							50,000,000			50,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.001							$ 0.001
Number of shares issued for acquisition (in shares)												27,900,000
Series A Preferred Stock
Stockholders Equity [Line Items]
Preferred stock, shares issued (in shares)			7,000,000							7,000,000			7,000,000		7,000,000
Number of votes | vote			1							1			1
Common Stock
Stockholders Equity [Line Items]
Number of shares issued (in shares)			7,500,000							50,400,000	50,400,000
Common stock issuance (in shares)					17,615,534		34,473,719	1,000,000	1,000,000
Common stock issuance | $					$ 18		$ 35	$ 1
Common stock issuance for professional fees (in shares)				260,000	440,909	250,000	515,942	429,000	429,000
Warrants
Stockholders Equity [Line Items]
Number of shares issued for acquisition (in shares)												10,300,000
Private Placement
Stockholders Equity [Line Items]
Number of shares authorized (in shares)	80,400,000
Period of selling stock	36 months
Consecutive trading days, option one	2 days
Consecutive trading days, option two	5 days
Stock ownership percentage limitation	4.99%			4.99%
Common stock issuance | $				$ 27,300
Private Placement | Cantor Fitzgerald & Co
Stockholders Equity [Line Items]
Number of shares issued (in shares)			2,000,000
Maximum consideration in potential offerings | $														$ 350,000
Consideration payable to purchaser, as a percentage of gross proceeds			3.00%
Investment consideration | $			$ 4,200
Stock issuance costs | $			100
Private Placement | Common Stock
Stockholders Equity [Line Items]
Common stock issuance (in shares)				10,000,000						10,000,000	10,000,000	34,500,000
Common stock issuance | $				$ 10						$ 27,300
Settlement Of Third Party Debt
Stockholders Equity [Line Items]
Common stock issuance (in shares)												2,000,000
Qingdao Xingyang City Investment
Stockholders Equity [Line Items]
Aggregate investment			$ 28,000							28,000			¥ 200.0
Payments for investments | ¥									¥ 50.0
Remaining capital contribution										$ 21,000	¥ 150.0
Number of installments | installment										3	3
Installments of remaining capital contribution										$ 7,000	¥ 50.0
Dividend rate										6.00%	6.00%
Period to sell investments										1 year	1 year
Period to redeem investments										3 years	3 years
DBOT
Stockholders Equity [Line Items]
Number of shares issued for acquisition (in shares)						1,600,000						13,000,000