Income taxes (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Significant components of deferred tax assets were as follows as of December 31:

	2014		2013
U.S. federal tax loss carry–forward	$	10,779	$	8,511
U.S. State tax loss carry–forward		1,498		653
U.S. federal capital loss carry–forward		188		706
U.S. foreign tax credit carry–forward		-		248
Equity–based compensation, fixed assets and other		1,598		1,446
Total deferred tax assets		14,063		11,564
Less: valuation allowance		(14,063)		(11,564)
Net deferred tax asset	$	–	$	–

Summary of Operating Loss Carryforwards [Table Text Block]

As of December 31, 2014, the Company had the following tax attributes:

	Amount		Begins to expire
U.S. federal net operating loss carry–forwards	$	34,572		Fiscal 2023
U.S. State net operating loss carry–forwards		18,052		Fiscal 2031
U.S. federal capital loss carry–forwards		553		Fiscal 2015

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The provision for/(benefit from) income tax differs from the amount computed by applying the statutory federal income tax rate to income before the provision for/(benefit from) income taxes. The sources and tax effects of the differences are as follows for the years ended December 31:

	2014			2013
Expected Federal Tax		(34.00)	%		(34.00)	%
State Tax (Net of Federal Benefit)		(5.48)			(6.63)
Permanent differences		0.12			1.98
Loss of NOL benefit of closed foreign entity		—			142.44
Write-off of deferred tax asset		4.29			—
Adjustments to deferred tax balances		(8.34)			—
Foreign tax credit		—			(1.60)
Other		0.05			1.78
Change in valuation allowance		43.36			103.98
Effective rate of income tax		0	%		0	%