Organization - Summary of Cash Flows of VIE Included in Consolidated Statements of Cash Flows (Detail)	12 Months Ended
Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Variable Interest Entity [Line Items]
Net cash provided by (used in) operating activities	¥ (404,390,831)	$ (63,457,746)	¥ (621,612,202)	¥ 422,895,235
Net cash (used in) provided by investing activities	2,661,222,986	417,603,959	(493,563,047)	(1,198,405,622)
Net cash provided by/ (used in) financing activities	(1,946,434,308)	(305,438,017)	(380,822,429)	730,547,890
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(15,008,806)	(2,355,209)	(36,093,321)	11,516,258
Consolidated VIE [Member]
Variable Interest Entity [Line Items]
Net cash provided by (used in) operating activities	(374,886,851)	(58,827,928)	(626,884,394)	405,810,921
Net cash (used in) provided by investing activities	744,832,757	116,880,513	(81,038,760)	(782,481,722)
Net cash provided by/ (used in) financing activities	(554,832,190)	(87,065,278)	¥ (71,082,260)	¥ 1,004,220,135
Effect of exchange rate changes on cash, cash equivalents and restricted cash	¥ (55,087)	$ (8,644)

Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 230
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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