Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Issuance of common stock tax benefits	$ 0	$ 0
Common Stock [Member]
Issuance of common stock tax benefits	0	0
Additional Paid-in Capital [Member]
Issuance of common stock tax benefits	$ 0	$ 0