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Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income taxed at statutory rates	$ (2,311)	$ (2,125)
Stock-based compensation	84	79
Other adjustments	102	5
Prior year provision to actual adjustments	475	(2,867)
Change in foreign tax rate	(1,361)
Differences in tax rates	(284)	(339)
Effect of foreign exchange	66	(6)
Change in valuation allowance	$ 3,229	$ 5,253

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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