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Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Parenthetical) (Details)	Dec. 31, 2018 $ / shares shares	Mar. 31, 2018 shares	Dec. 31, 2017 $ / shares shares	Sep. 18, 2015 $ / shares shares	Sep. 18, 2015 ¥ / shares shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| (per share)	$ 0.00005		$ 0.00005	$ 0.00005	¥ 0.0003
Ordinary shares, shares authorized	1,000,000,000		1,000,000,000	1,000,000,000	1,000,000,000
Ordinary shares, shares issued			4,329,000	1	1
Ordinary shares, shares outstanding		4,329,000	4,329,000
Class A Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	796,062,195		796,062,195
Ordinary shares, shares issued	1,818,383
Ordinary shares, shares outstanding	1,773,301	63,714
Class B Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	826,389		826,389
Ordinary shares, shares issued	826,389
Ordinary shares, shares outstanding	826,389
Class C Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	203,111,416		203,111,416
Ordinary shares, shares issued	4,265,286
Ordinary shares, shares outstanding	4,265,286	4,265,286
Parent Company
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	1,000,000,000		1,000,000,000
Ordinary shares, shares issued	0		4,329,000
Ordinary shares, shares outstanding	0		4,329,000
Parent Company \| Class A Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	796,062,195		796,062,195
Ordinary shares, shares issued	1,818,383		0
Ordinary shares, shares outstanding	1,773,301		0
Parent Company \| Class B Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	826,389		826,389
Ordinary shares, shares issued	826,389		0
Ordinary shares, shares outstanding	826,389		0
Parent Company \| Class C Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Ordinary shares, par value \| $ / shares	$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	203,111,416		203,111,416
Ordinary shares, shares issued	4,265,286		0
Ordinary shares, shares outstanding	4,265,286		0