Income Taxes (Components of Deferred Tax Assets) (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets, Net [Abstract]
Net operating loss carry-forwards	$ 36,405,000	$ 31,243,000
Capitalized research and development	16,306,000	15,789,000
Stock-based compensation	2,467,000	2,087,000
Depreciation and amortization	1,301,000	1,405,000
Lease accounting	10,631,000	3,478,000
Other	1,174,000	989,000
Total deferred tax assets before valuation allowance	68,284,000	54,991,000
Less: valuation allowance	(58,251,000)	(51,972,000)
Total deferred tax assets after valuation allowance	10,033,000	3,019,000
Deferred Tax Liabilities, Net [Abstract]
Right-of-use asset	(10,033,000)	(3,019,000)
In-process research and development	(3,077,000)	(3,077,000)
Total deferred tax liabilities	13,110,000	6,096,000
Net deferred tax liability	$ (3,077,000)	$ (3,077,000)