Income Taxes (Components of Deferred Tax Assets) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets, Net [Abstract]
Net operating loss carry-forwards	$ 26,291,000	$ 17,035,000
Capitalized research and development	15,262,000	15,504,000
Deferred consideration		313,000
Stock-based compensation	1,358,000	934,000
Depreciation and amortization	1,632,000	1,237,000
Lease accounting	801,000	189,000
Other	981,000	906,000
Total deferred tax assets before valuation allowance	46,325,000	36,118,000
Less: valuation allowance	(45,670,000)	(36,118,000)
Total deferred tax assets after valuation allowance	655,000	$ 0
Deferred Tax Liabilities, Net [Abstract]
Right-of-use asset	(655,000)
In-process research and development	(3,077,000)
Total deferred tax liabilities	3,732,000
Net deferred tax liability	$ (3,077,000)