Net Loss Per Share (Computation of Basic and Diluted Net Loss Per Share) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Significant Accounting Policies
Net loss basic	$ (23,155,000)	$ (22,181,000)
Weighted average shares outstanding, basic	24,104,146	16,415,012
Net loss per share, basic	$ (0.96)	$ (1.35)
Weighted average shares outstanding, diluted	24,104,146	16,415,012
Net loss per share, diluted	$ (0.96)	$ (1.35)