Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 2,871	$ 4,017
Series E Preferred stock, shares authorized	1,000,000
Series E Preferred stock, shares outstanding	0	0
Series F Preferred stock, par value	$ 0.001	$ 0.001
Series F Preferred stock, shares authorized	18,000	18,000
Series F Preferred stock, shares issued	0	1,000
Series F Preferred stock, shares outstanding	0	1,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	153,322,000	97,709,000
Common stock, shares outstanding	153,277,000	97,663,000

Amount of allowance for credit loss on accounts receivable, classified as current.

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