Income Taxes - Income (Loss) Before Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic	$ (1,723)	$ 2,468	$ (1,527)
Foreign	6,281	3,359	14,153
INCOME BEFORE INCOME TAX (BENEFIT) EXPENSE	$ 4,558	$ 5,827	$ 12,626