−Removed: Unregistered Sales
−Removed: of Equity Securities and Use of Proceeds
−Removed: Recent Sales of Unregistered
+Added: Unregistered Sales of
+Added: Equity Securities and Use of Proceeds
+Added: Recent Sales of Unregistered Securities
a private placement for shares of our common stock in March 2020 (the 2020 Placement).
2 unchanged sentences
to us of approximately $2.8 million.
−Removed: Defaults Upon Senior Securities
−Removed: Mine Safety Disclosures
+Added: 2021, we issued $1.1 million aggregate principal amount of convertible promissory notes.
+Added: Upon Senior Securities
+Added: Safety Disclosures
Not applicable.
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.