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13. Income Tax (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense (benefit) at the federal statutory rate	$ (10,799)	$ (5,314)
Tax Rate Re-measurement - 2017 Tax Cut	19,600	0
State tax expense (benefit)	(1,689)	(775)
Foreign tax rate differential	1,154	(401)
Stock-based compensation	299	152
Interest Expense	33	26
Other	(24)	127
Credits	(24)	(24)
Valuation Allowance	(8,544)	6,215
Income Tax Expense	$ 6	$ 6
Effective Tax Rate	(0.02%)	(0.04%)

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