Series C Redeemable Convertible Preferred Stock	3 Months Ended
Mar. 31, 2021
Series C Convertible Preferred Stock [Abstract]
Series C Redeemable Convertible Preferred Stock	Note 5. Series C Redeemable Convertible Preferred Stock The Series C Convertible Preferred Stock had a stated value of $10,000 plus a $1,671 increase in the stated value, which sum is convertible into Andrea’s common stock at a conversion price of $0.2551. The shares of Series C Convertible Preferred Stock are subject to antidilution provisions, which are triggered in the event of certain stock splits, recapitalizations, or other dilutive transactions. In addition, issuances of common stock at a price below the conversion price of $0.2551, or the issuance of warrants, options, rights, or convertible securities which have an exercise price or conversion price less than that conversion price, other than for certain previously outstanding securities and certain “excluded securities” (as defined in the certificate of amendment), require the adjustment of the conversion price to that lower price at which shares of common stock have been issued or may be acquired. In the event that Andrea issues securities in the future which have a conversion price or exercise price which varies with the market price and the terms of such variable price are more favorable than the conversion price in the Series C Convertible Preferred Stock, the purchasers may elect to substitute the more favorable variable price when making conversions of the Series C Convertible Preferred Stock. As of March 31, 2021, there were 11.469249 shares of Series C Convertible Preferred Stock outstanding, which were convertible into 524,736 shares of Andrea’s common stock and had remaining accrued dividends of $19,168.

Note 5. Series C Redeemable Convertible Preferred Stock

The Series C Convertible Preferred Stock had a stated value of $10,000 plus a $1,671 increase in the stated value, which sum is convertible into Andrea’s common stock at a conversion price of $0.2551. The shares of Series C Convertible Preferred Stock are subject to antidilution provisions, which are triggered in the event of certain stock splits, recapitalizations, or other dilutive transactions. In addition, issuances of common stock at a price below the conversion price of $0.2551, or the issuance of warrants, options, rights, or convertible securities which have an exercise price or conversion price less than that conversion price, other than for certain previously outstanding securities and certain “excluded securities” (as defined in the certificate of amendment), require the adjustment of the conversion price to that lower price at which shares of common stock have been issued or may be acquired. In the event that Andrea issues securities in the future which have a conversion price or exercise price which varies with the market price and the terms of such variable price are more favorable than the conversion price in the Series C Convertible Preferred Stock, the purchasers may elect to substitute the more favorable variable price when making conversions of the Series C Convertible Preferred Stock.

As of March 31, 2021, there were 11.469249 shares of Series C Convertible Preferred Stock outstanding, which were convertible into 524,736 shares of Andrea’s common stock and had remaining accrued dividends of $19,168.