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Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Share Option Activity

The following table summarizes the share option activities for the years ended December 31, 2018, 2019 and 2020:

​	​	​	​	​	​	​	​	​	​	​
​	​	​		​		​		Weighted		​
​	​	​	​	Weighted	​	Weighted-	​	average	​	​
​	​	​	​	average	​	average	​	remaining	​	Aggregate
​	​	Number of	​	exercise	​	grant-date	​	contractual life	​	intrinsic
​		share options		price (USD)		fair value (USD)		(years)		value (USD)
Outstanding, January 1, 2018		389,815		3.90		—		1.64		—
Vested and expected to vest at January 1, 2018		389,693		3.90		0.95		1.64		—
Exercisable at January 1, 2018		389,190		3.90		0.95		1.64		—
Expired		(373,315)		3.89
Outstanding, December 31, 2018		16,500		3.97		—		1.37		—
Vested and expected to vest at December 31, 2018		16,500		3.97		1.56		1.37		—
Exercisable at December 31, 2018		16,500		3.97		1.56		1.37		—
Expired		(6,500)		3.97		​	​	​	​	​
Outstanding, December 31, 2019		10,000		3.97		—	​	1.16	​	—
Vested and expected to vest at December 31, 2019		10,000		3.97		1.01	​	1.16	​	—
Exercisable at December 31, 2019		10,000		3.97		1.01	​	1.16	​	—
Expired		(10,000)		3.97		​	​	​	​	​
Outstanding, December 31, 2020		—		—		—	​	—	​	—
Vested and expected to vest at December 31, 2020		—		—		—	​	—	​	—
Exercisable at December 31, 2020		—		—		—	​	—	​	—

Schedule of Recognized Compensation Costs

Total compensation costs recognized for the years ended December 31, 2018, 2019 and 2020 are as follows:

​	​	​	​	​	​	​
​	​	Years ended December 31,
(In thousands)		2018		2019		2020
Sales and marketing expenses		404		381		185
General and administrative expenses		2,245		2,453		1,209
Research and development expenses		2,645		2,594		916
Total		5,294		5,428		2,310

2013 Plan

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2013 Plan for the years ended December 31, 2018, 2019 and 2020 is presented below:

​	​	​
​		Number of
​	​	restricted shares
Unvested at January 1, 2018		587,760
Vested		(525,140)
Forfeited		(28,445)
Unvested at December 31, 2018		34,175
Expected to vest at December 31, 2018		29,049
Unvested at January 1, 2019		34,175
Vested		(27,475)
Forfeited		(6,700)
Unvested at December 31, 2019		—
Expected to vest at December 31, 2019		—

2010 Plan

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2010 Plan for the years ended December 31, 2018, 2019 and 2020 is presented below:

​	​	​	​	​
​	​	​	​	Weighted-average
​	​	Number of	​	grant-date fair
​		restricted shares		value
Unvested at January 1, 2018		1,272,150
Expected to vest at January 1, 2018	​	1,081,327
Granted		6,750,520		2.32
Vested		(267,630)
Forfeited		(1,103,000)
Unvested at December 31, 2018		6,652,040
Expected to vest at December 31, 2018		5,654,234		​
Granted		800,000		0.81
Vested		(1,296,540)		​
Forfeited		(971,000)		​
Unvested at December 31, 2019		5,184,500		​
Expected to vest at December 31, 2019		4,406,825		​
Vested		(965,500)		​
Forfeited		(2,959,000)		​
Unvested at December 31, 2020		1,260,000		​
Expected to vest at December 31, 2020		1,071,000		​

2014 Plan

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2014 Plan for the years ended December 31, 2018, 2019 and 2020 is presented below:

​	​	​
​		Number of
​	​	restricted
​	​	shares
Unvested at January 1, 2018		5,806,350
Vested		(2,086,450)
Forfeited		(243,250)
Unvested at December 31, 2018		3,476,650
Expected to vest at December 31, 2018		2,955,153
Unvested at January 1, 2019		3,476,650
Vested		(1,318,450)
Forfeited		(837,000)
Unvested at December 31, 2019		1,321,200
Expected to vest at December 31, 2019		1,123,020
Unvested at January 1, 2020		1,321,200
Vested		(228,200)
Forfeited		(1,067,000)
Unvested at December 31, 2020		26,000
Expected to vest at December 31, 2020		22,100

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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