Stockholders' Equity - Stock Option Activity (Details) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Stock option activity
Stock options outstanding at beginning of period	32,194
Granted	0	0
Expired	(1,057)
Forfeited	(199)
Stock options outstanding at end of period	30,938
Stock options exercisable at end of period	24,198
Weighted average exercise price
Stock options outstanding at beginning of period (in dollars per share)	$ 725.86
Expired (in dollars per share)	1,929.56
Forfeited (in dollars per share)	500.20
Stock options outstanding at end of period (in dollars per share)	686.19
Stock options exercisable at end of period (in dollars per share)	$ 803.73
Aggregate Intrinsic Value
Stock options outstanding at beginning of period	$ 9,052
Stock options outstanding at end of period	427
Stock options exercisable at end of period	$ 427
Weighted Average Remaining Contractual Life
Stock options outstanding at end of period	7 years 8 months 12 days
Stock options exercisable at end of period	7 years 6 months
Unrecognized compensation expense	$ 1,400,000
Weighted-average recognition period	9 months 18 days