Stock-Based Compensation, Stock Options (Details) - Stock Options [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares shares
Number of Shares under Option Plan [Abstract]
Outstanding at beginning period (in shares) | shares	7,728,721
Granted (in shares) | shares	100,000
Forfeited and expired (in shares) | shares	(2,437,652)
Outstanding at end of period (in shares) | shares	5,391,069
Exercisable at end of period (in shares) | shares	1,231,465
Vested and expected to vest (in shares) | shares	5,391,069
Weighted-Average Exercise Price per Option [Abstract]
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 1.11
Granted (in dollars per share) | $ / shares	0.54
Forfeited and expired (in dollars per share) | $ / shares	1.55
Outstanding at end of period (in dollars per share) | $ / shares	0.89
Exercisable at end of period (in dollars per share) | $ / shares	1.7
Vested and expected to vest (in dollars per share) | $ / shares	$ 0.89
Weighted-Average Remaining Contractual Term [Abstract]
Outstanding	8 years 8 months 12 days
Exercisable	6 years 1 month 6 days
Vested and expected to vest	8 years 8 months 12 days
Unrecognized compensation expense | $	$ 1,687
Unrecognized compensation expense, weighted average period	2 years 10 months 24 days
Intrinsic value of options outstanding | $	$ 0
Intrinsic value of options exercisable | $	$ 0