Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Issuance of common stock, excess tax benefits	$ 0	$ 0	$ 0	$ 0
Common Stock [Member]
Issuance of common stock, excess tax benefits	0	0	0	0
Additional Paid-in Capital [Member]
Issuance of common stock, excess tax benefits	$ 0	$ 0	$ 0	$ 0