Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 116	$ 348
Finance lease expense:
Amortization of leased assets	4	12
Interest on lease liabilities	2	5
Total finance lease cost	6	17
Total lease expense	$ 122	$ 365