Note 8. Convertible Notes

On December 4, 2020, the Company provided a notice of redemption to the holders of the Company’s outstanding $10,000,000 aggregate principal amount of 6.5% Convertible Senior Notes due 2023 (CUSIP No: 00973N AC6) (the “October 2018 Notes”) regarding the Company’s exercise of its option to redeem all October 2018 Notes on February 1, 2021 (the “October Redemption Date”), unless earlier converted as described below, pursuant to the indenture governing the October 2018 Notes. Pursuant to the notice of redemption, the Company would pay holders of the October 2018 Notes that are redeemed a redemption price equal to 100% of the aggregate principal amount of October 2018 Notes being redeemed, plus accrued and unpaid interest as well as an interest make-whole payment with respect to those October 2018 Notes that are redeemed.

All of the holders of the October 2018 Notes elected to convert the October 2018 Notes into shares of common stock of the Company prior to the October Redemption Date at a conversion rate equal to 196.08 shares of common stock per $1,000 principal amount of Notes (equivalent to a conversion price of approximately $5.10 per share).

During the quarter ended March 31, 2021, the Company converted approximately $10.0 million of principal into approximately 1.96 million shares of the Company’s common stock. The Company also recognized $96 thousand of unamortized debt discount as a reduction to equity.

On January 25, 2021, the Company provided a notice of redemption to the holders of the Company’s outstanding $15,000,000 aggregate principal amount of 6.5% Convertible Senior Secured Notes due 2023 (CUSIP No: 00973N AA0) (the “May 2018 Notes”) regarding the Company’s exercise of its option to redeem all Notes on March 1, 2021 (the “May Redemption Date”), unless earlier converted as described below, pursuant to the indenture governing the Notes. Pursuant to the notice of redemption, the Company would pay holders of the Notes that are redeemed a redemption price equal to 100% of the aggregate principal amount of Notes being redeemed, plus accrued and unpaid interest.

All of the holders of the May 2018 Notes elected to convert the May 2018 Notes into shares of common stock of the Company prior to the May Redemption Date at a conversion rate equal to 200 shares of common stock per $1,000 principal amount of notes (equivalent to a conversion price of $5.00 per share). The holders of the May 2018 Notes also received an interest make-whole payment at a weighted average rate of 1.52 shares per $1,000 principal amount of notes with respect to those May 2018 Notes that were converted.

During the quarter ended March 31, 2021, the Company converted approximately $15.0 million of principal and $366 thousand of make whole payment liability into approximately 3.02 million shares of the Company’s common stock. The Company also recognized $477 thousand of unamortized debt discount as additional interest expense during the conversion.

The following table summarizes convertible debt as of June 30, 2020 (in thousands):