Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Income tax expenses	$ 193	$ 91	$ 108
Deferred tax assets	5,000	7,000
Operating loss carryforwards	22	550
Deferred tax assets, valuation allowance	5,000	7,000
Section 267(a)
Operating Loss Carryforwards [Line Items]
Amount related to losses disallowed under code sections	4,000	7,000
Section 163(j)
Operating Loss Carryforwards [Line Items]
Amount related to losses disallowed under code sections	$ 1,000	$ 0