Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of uncertain tax benefits
Balance at beginning of the year	$ 103	$ 2,827	$ 2,400
Additions (reductions) for taxes positions related current year			55
Additions (reductions) for taxes positions related current year	0	(141)
Additions (reductions) for taxes positions related to prior years	13		372
Additions (reductions) for taxes positions related to prior years		(2,583)
Balance at the end of the year	$ 116	$ 103	$ 2,827