Equity Incentive Plans (Restricted stock award) (Details) - Restricted Stock [Member] - C3J Stock Plan 2016 [Member]	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Shares
Outstanding at beginning of period (in shares) | shares	343,493
Forfeited/Cancelled (in shares) | shares	(4,010)
Issued as Common Stock | shares	(76,925)
Outstanding at end of period (in shares) | shares	262,558
Weighted Avg Grant Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 21.83
Forfeited/Cancelled (in dollars per share) | $ / shares	16.02
Issued as Common Stock | $ / shares	15.50
Outstanding at end of period (in dollars per share) | $ / shares	$ 23.76