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Share-based compensation (Binomial option-pricing) (Details) - $ / shares

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Weighted average fair value per option granted

$ 1.7582

$ 2.6425

Weighted average exercise price

$ 3.5350

$ 4.7025

Risk-free interest rate

1.82%

2.77%

Expected volatility

56.00%

57.00%

Dividend yield

0.00%

0.00%

Minimum

Expected term (in year)

5 years

Huya 2017 Share Incentive Plan [Member]

Weighted average fair value per option granted

$ 5.2130

$ 1.3798

Weighted average exercise price

$ 2.4672

$ 2.55

Risk-free interest rate

^[1]

2.83%

2.25%

Expected term (in year)

^[2]

10 years

10 years

Expected volatility

^[3]

55.00%

55.00%

Dividend yield

^[4]

0.00%

0.00%

[1]	The risk-free interest rate of periods within the contractual life of the share option is based on the China Government Bond yield as at the valuation dates.
[2]	The expected term is the contract life of the option.
[3]	Expected volatility is estimated based on the average of historical volatilities of the comparable companies in the same industry as at the valuation dates.
[4]	Huya has no history or expectation of paying dividend on its ordinary shares. The expected dividend yield was estimated based on Huya’s expected dividend policy over the expected term of the option.

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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