CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	1,000	1,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized	30,000	30,000
Common stock, shares issued	6,602	6,601
Common stock, shares outstanding	6,602	6,601
Series A Convertible Preferred Stock
Preferred Stock, Shares Issued	200	0
Preferred Stock, Shares Outstanding	200	0
Preferred stock, liquidation preference, value	$ 5.0