Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts receivable, allowance for doubtful accounts	$ 6,065	$ 6,049
Accumulated depreciation	$ 200,680	$ 196,683
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized	1,600,000,000	1,600,000,000
Common stock, shares issued	487,008,798	267,646,667
Common stock, shares outstanding	484,557,092	265,194,961
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	20,000,000	20,000,000
Common stock held in treasury at cost (in shares)	2,451,706	2,451,706
Series A Preferred Stock
Preferred stock, shares issued	2,778,111	2,778,111
Preferred stock, shares outstanding	2,778,111	2,778,111
Series B Preferred Stock
Preferred stock, shares issued	900,328	0
Preferred stock, shares outstanding	900,328	0