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Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of the (benefit) provision for income taxes
Loss from continuing operations before taxes	$ (8,463)	$ (13,774)
Income tax expense computed at statutory federal tax rate	(2,877)	(4,683)
Disallowed expenses and non-taxable income	3	12
Loss surrendered to generate R&D credit	856	1,945
Additional research and development tax relief	(1,262)	(2,827)
Change in valuation allowance	(4,487)	2,029
Foreign items, including change in tax rates, and other	1,901	1,238
Change in US Tax Rate	4,112	0
Other foreign items	761	303
Income tax benefit, total	$ (993)	$ (1,983)

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The sum of the differences between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to nondeductible expenses under enacted tax laws, differences in the methodologies used to determine expense amounts for financial statements prepared in accordance with generally accepted accounting principles and income that is exempt from income taxes under enacted tax laws.

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