UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
General and administrative expenses	$ 7,692	$ 4,630	$ 18,089	$ 12,048
General and Administrative Expense [Member]
General and administrative expenses	7,204	4,330	16,846	11,295
Non Cash Stock Compensation Expense [Member]
Non-cash stock based compensation credit	$ 488	$ 300	$ 1,243	$ 753