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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2022
Stockholders' Equity Note [Abstract]  
Summary of Warrant Activity and Changes in Warrants Outstanding
A summary of warrant activity and changes in warrants outstanding, including both liability and equity classifications, is presented below:
 Number of
Warrants
Weighted-Average
Exercise Price
Per Share
Weighted-Average Remaining Contractual Term
Balance outstanding, December 31, 20205,260,992 $5.19 4.1 years
Exercised(770,833)$1.64  
Balance outstanding, December 31, 20214,490,159 $5.80 3.0 years
Expired(129,191)$21.60 
Balance outstanding, December 31, 20224,360,968 $5.33 2.1 years
Schedule of Preferred Stock
A summary of our Company's classes of preferred stock is presented below:
Shares issued and outstanding
ClassPar valueShares designatedAs of December 31, 2022As of December 31, 2021
Series A Convertible Preferred Stock$0.001 277,100 60,600 60,600 
Series B Convertible Preferred Stock$0.001 8,860 — — 
Series C Convertible Preferred Stock$0.001 200,000 — — 
Series D Convertible Preferred Stock$0.0001 154,670 — — 
Series E Convertible Preferred Stock$0.001 865,824 — 655,044 
The components of the liquidation preference for the Series A Convertible Preferred Stock were as follows:
 As of December 31,
(in thousands)20222021
Stated Value per share liquidation$606 $606 
Cumulative unpaid preferred stock dividends438 414 
Liquidation preference - Series A Convertible Preferred Stock$1,044 $1,020