CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Accounts receivable, allowance for doubtful accounts	$ 785	$ 475
STOCKHOLDERS' DEFICIT
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	800,000,000	800,000,000
Common stock, shares issued (in shares)	517,195,705	481,619,621
Common stock, shares outstanding (in shares)	517,195,705	481,619,621
Series A Convertible Preferred Stock [Member]
STOCKHOLDERS' DEFICIT
Preferred stock, shares authorized (in shares)	6,175	6,175
Series B Convertible Preferred Stock [Member]
STOCKHOLDERS' DEFICIT
Preferred stock, shares authorized (in shares)	293	293
Series C Convertible Preferred Stock [Member]
STOCKHOLDERS' DEFICIT
Preferred stock, shares authorized (in shares)	90	90
Series D Convertible Preferred Stock [Member]
STOCKHOLDERS' DEFICIT
Preferred stock, shares authorized (in shares)	8	8