Income taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income taxes

Schedule of income tax expense (benefit) by jurisdiction

	2015		2014		2013
U.S. federal:
Current	$	27	$	6	$	(402	)
Deferred		319		328		1,158
Total U.S. federal	$	346	$	334	$	756
U.S. state and local:
Current	$	134	$	226	$	248
Deferred		1		140		457
Total U.S. state and local	$	135	$	366	$	705

Schedule of reconciliation of tax rates

	2015			2014			2013
Federal statutory rate		34.0	%		34.0	%		34.0	%
State and local		4.1			4.6			(5.7	)
Foreign rate differential		(0.5	)		(0.7	)		(3.2	)
Stock options		(1.5	)		(0.5	)		(0.7	)
Non-controlling interests		0.5			1.9			15.2
Valuation allowance		(39.0	)		(45.1	)		(128.5	)
Transaction costs		—			—			(6.7	)
Purchase price adjustments		—			—			6.6
Revaluation of deferred tax assets		—			—			2.8
Uncertain tax positions		(0.1	)		(0.1	)		(2.9	)
Return to provision		—			0.6			9.3
Other		0.3			1.4			1.1
Income taxes		(2.2	)%		(3.9	)%		(78.7	)%

Schedule of deferred tax assets and liabilities

	2015			2014
Deferred tax assets:
Net operating loss carryforwards	$	16,895		$	10,115
Outside basis differences for U.S. partnerships		6,190			3,710
Stock options		3,882			3,348
Deferred revenue		376			648
Deferred compensation		301			144
State taxes		67			45
Other		1,312			1,341
Valuation allowance		(19,548	)		(12,470	)
Net deferred tax assets		9,475			6,881
Deferred tax liabilities:
Intangible assets		(6,268	)		(6,855	)
Property and equipment		(6,172	)		(2,671	)
Net deferred tax liabilities		(12,440	)		(9,526	)
Net deferred taxes	$	(2,965	)	$	(2,645	)

Schedule of changes in the valuation allowance

	Valuation Allowance
Balance, December 31, 2012	$	1,669
Additions charged to operations		2,432
Decrease credited to operations		—
Balance, December 31, 2013		4,101
Additions charged to operations		8,369
Decrease credited to operations		—
Balance, December 31, 2014		12,470
Additions charged to operations		7,078
Decrease credited to operations		—
Balance, December 31, 2015	$	19,548

Schedule of reconciliation of unrecognized tax benefits, excluding interest and penalties

	Uncertain Tax Positions
Balance, December 31, 2013	$	392
Additions for current period tax positions		—
Balance, December 31, 2014		392
Additions for current period tax positions		—
Effective settlement during the current period		(79	)
Balance, December 31, 2015	$	313