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Stockholders' Equity
 3 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Stockholders' Equity STOCKHOLDERS' EQUITY
We have authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of December 31, 2021.
Common Stock Warrants—In March 2012, we issued warrants to purchase 1,281,358 shares of common stock for $14.05 per share. During the fiscal quarter ended January 1, 2021, the holders of the warrants made cashless exercises of 1,281,358 shares at an exercise price of $14.05 per share, resulting in the issuance of 857,631 shares of common stock.
During the three months ended January 1, 2021, we recorded the changes in the estimated fair value of the warrants in the accompanying statements of operations. See Note 4 - Fair Value for additional information. See Note 11 - Earnings (Loss) Per Share for impact of the common stock warrants on loss per share.