Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 38,357,970	$ 33,431,082
Research and development credits	3,061,981	3,076,441
Deferred revenue	154,497	86,567
Inventory reserve	10,155	9,645
Fixed assets and intangibles	217,332	223,767
Accrued liability		86,034
Lease liability	359,603
Other	150,134	106,913
Gross deferred tax assets	43,768,107	38,740,784
Valuation allowance	(43,350,682)	(38,740,784)
Deferred tax assets, net	417,425
Deferred tax liabilities:
Right of use asset	311,633
Other	105,792
Total deferred tax liabilities	417,425
NuvoGen
Deferred tax assets:
Accrued liability	$ 1,456,435	$ 1,720,335