Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Statement Of Financial Position [Abstract]    
Allowance for accounts receivable $ 3,908 $ 4,017
Preferred stock, par value $ 0.001 $ 0.001
Series E Preferred stock, shares authorized 1,000,000 1,000,000
Series E Preferred stock, shares issued 0 0
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 149,427,000 97,709,000
Common stock, shares outstanding 149,382,000 97,663,000