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Share-based payments - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	12 Months Ended
	Jun. 03, 2016	Dec. 08, 2015	Nov. 16, 2015	Oct. 13, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014	Jun. 02, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payments						$ 29,249	$ 34,160		$ 23
Closing stock market price						$ 3.45
Number of options, Granted						30,000	85,000
Granted						$ 5.04	$ 10.39
Compensation cost recognized						$ 29,249	$ 34,616		23
Unrecognized share-based compensation cost in respect of granted share options						366
General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost recognized						$ 26,909	$ 33,850		$ 23
Michael Brauser, Executive Chairman of the Board [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual base salary			$ 25
Stockholder Approval [Member] | Michael Brauser, Executive Chairman of the Board [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issuable upon exercise of stock option			5,000,000
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock units outstanding					2,960,000	12,407,029	13,721,000	[1]	2,960,000
Restricted share units, granted					2,960,000	1,339,758	13,890,500	[1]
Unrecognized share-based compensation cost in respect of granted share options						$ 73,745
Unrecognized share-based compensation weighted average period						2 years 6 months
Restricted stock units, compensation cost						$ 30,126	$ 34,505		$ 23
Restricted Stock Units [Member] | Michael Brauser, Executive Chairman of the Board [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			4 years
Restricted share units, granted			5,000,000
RSU vesting condition						no portion of the RSUs shall vest unless and until the Company has, for any fiscal year in which the RSUs are outstanding, gross revenue determined in accordance with the Company’s audited financial statements in excess of $100.0 million for such fiscal year and positive earnings before income tax, interests, depreciation and amortization (“EBITDA”) (as determined based on the Company’s audited financial statements) for such fiscal year, after subtracting all charges for equity compensation paid to executives or other service providers to the Company (collectively, the “Vesting Conditions”).
Restricted Stock Units [Member] | Stockholder Approval [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted share units, granted							12,312,000
Restricted Stock Units [Member] | Best One Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Business acquisition, common stock issued						960,000
Award vesting period						2 years
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	4 years
Number of options, Granted	30,000
Granted						$ 3.55	$ 7.35		$ 0
Issuance of common shares upon cashless exercise of warrants, shares						0	0		0
Fair value of option vested						$ 272	$ 61		$ 0
Unrecognized share-based compensation weighted average period						3 years
Employee Stock Option [Member] | General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost recognized						$ 110	28		0
Marlin Capital Investments, LLC [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ownership percentage by Mike Brauser in Marlin Capital Investments LLC						50.00%
Marlin Capital Investments, LLC [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vested beginning date				Oct. 13, 2015
Share-based payments						$ 1,252	1,512		$ 0
Restricted share units, granted				2,000,000
Marlin Capital Investments, LLC [Member] | Restricted Stock Units [Member] | Best One Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock units outstanding						2,000,000
Business acquisition, common stock issued						2,000,000
Shares vested beginning date						Oct. 13, 2015
Share-based compensation description						These RSUs vest annually beginning from October 13, 2015 only if certain performance goals of the Company are met. The shares underlying such RSUs will not be delivered until October 13, 2018, unless there is a change of control of the Company.
Share-based payments						$ 1,252	$ 1,512
Frost Gamma [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted share units, granted		3,000,000
Third-party vendors [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common shares to vendors for services rendered, shares						14,500	45,000		0
Third-party vendors [Member] | Restricted Stock Units [Member] | General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock compensation expenses						$ 166	$ 446		$ 0
2015 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock authorized for issuance						12,500,000				2,500,000
Common stock reserved for future issuance						5,555,742
2008 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance						180,568
[1] Among the grants in 2015 and the unvested balance as of December 31, 2015, 12,312,000 shares, with weighted average grant-date fair value of $9.48, were subsequently approved at the Company’s annual meeting of stockholders on June 3, 2016.

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