Redeemable Convertible Preferred Stock	12 Months Ended
Dec. 31, 2020
Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock	17. Redeemable Convertible Preferred Stock, as restated Series E Preferred Stock In November 2018, the Company issued an aggregate of 35,000 shares of the Company’s Series E Preferred Stock in a private placement to certain accredited investors in reliance on Section 4(a)(2) of the Securities Act. The Company received net proceeds of approximately $30.9 million, after deducting placement agent fees and expenses payable by the Company. The Company is required to redeem the Series E Preferred Stock in thirteen monthly installments in the amount of $2.7 million each from May 2019 through May 2020. The Company had 0 and 500 shares of Series E Preferred Stock outstanding at December 31, 2020 and 2019, respectively. The remaining 500 shares were converted to common stock in January 2020. During 2019, certain conversions of the Series E preferred stock resulted in a deemed dividend of approximately $1.8 million that is reflected on the Company’s consolidated statement of operations as Preferred stock dividends declared, deemed dividends and accretion of discount. Series C Preferred Stock In April 2020, 870 shares of Series C Preferred Stock were converted to 923,819 shares of common stock. In May 2020, the remaining the 1,750 shares of Series C Preferred Stock were converted into 1,858,256 shares of common stock.

Redeemable Convertible Preferred Stock

12 Months Ended

Dec. 31, 2020

Redeemable Convertible Preferred Stock

17. Redeemable Convertible Preferred Stock, as restated

Series E Preferred Stock

In November 2018, the Company issued an aggregate of 35,000 shares of the Company’s Series E Preferred Stock in a private placement to certain accredited investors in reliance on Section 4(a)(2) of the Securities Act. The Company received net proceeds of approximately $30.9 million, after deducting placement agent fees and expenses payable by the Company. The Company is required to redeem the Series E Preferred Stock in thirteen monthly installments in the amount of $2.7 million each from May 2019 through May 2020. The Company had 0 and 500 shares of Series E Preferred Stock outstanding at December 31, 2020 and 2019, respectively. The remaining 500 shares were converted to common stock in January 2020.

During 2019, certain conversions of the Series E preferred stock resulted in a deemed dividend of approximately $1.8 million that is reflected on the Company’s consolidated statement of operations as Preferred stock dividends declared, deemed dividends and accretion of discount.

Series C Preferred Stock

In April 2020, 870 shares of Series C Preferred Stock were converted to 923,819 shares of common stock. In May 2020, the remaining the 1,750 shares of Series C Preferred Stock were converted into 1,858,256 shares of common stock.