Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating lease cost	$ 1,500
Interest on leased obligations	500
Cash paid for amounts included in the measurement of operating lease liabilities	1,700
Non cash lease expenses	$ 947	$ 0	$ 0