Fixed Assets (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Less accumulated depreciation and amortization	$ (5,768,000)		$ (4,793,000)
Depreciation and amortization	975,295	$ 968,034
Less accumulated depreciation and amortization Fixed assets net	(961,000)
Fixed assets, net	5,036,406		5,997,582
Manufacturing Facility/ clean room [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	3,081,000		3,076,000
Fixed Additions	$ 5,000
Manufacturing Facility/ clean room [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Manufacturing Facility/ clean room [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 6,075,000		6,075,000
Estimated useful lives	10 years
Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 511,000		511,000
Office Furniture And Equipment [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Office Furniture And Equipment [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 1,137,000		$ 1,128,000
Fixed Additions	$ 9,000
Lab Equipment [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Lab Equipment [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years