Other Income, Net of Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Interest income	$ 198	$ 295	$ 418	$ 569
Gain on investments	172	49	107	198
Other	64	28	143	72
Total	$ 434	$ 372	$ 668	$ 839