Equity Incentive Plans (Restricted stock award) (Details) - Restricted Stock Awards [Member] - C3J Stock Plan 2016 [Member]	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Shares
Outstanding at beginning of period (in shares) | shares	129,666
Granted (in shares) | shares	200,000
Forfeited/Cancelled (in shares) | shares	(27,341)
Vested and Issued as Common Stock (in shares) | shares	(102,325)
Outstanding at end of period (in shares) | shares	200,000
Weighted Avg Grant Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 27.11
Granted (in dollars per share) | $ / shares	2.39
Forfeited/Cancelled (in dollars per share) | $ / shares	39.53
Vested and Issued as Common Stock (in dollars per shares) | $ / shares	23.79
Outstanding at end of period (in dollars per share) | $ / shares	$ 2.39