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Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Summary of Significant Accounting Policies        
Net loss $ (5,316) $ (6,526) $ (27,897) $ (15,442)
Paid-in-kind dividend on Series C convertible preferred stock (2,000) (2,000) (6,000) (6,196)
Net loss attributable to common stockholders $ (7,316) $ (8,526) $ (33,897) $ (21,638)
Weighted average common shares issued and outstanding - basic 48,520,696 46,137,147 49,148,558 45,220,319
Weighted average common shares issued and outstanding - diluted 48,520,696 46,137,147 49,148,558 45,220,319
Basic net loss per share $ (0.15) $ (0.18) $ (0.69) $ (0.48)
Diluted net loss per share $ (0.15) $ (0.18) $ (0.69) $ (0.48)