Leases (Schedule of Maturities of Lease Liabilities) (Details) - USD ($)		Dec. 31, 2020	Jan. 02, 2019
Operating
2021		$ 1,005,811
2022		570,656
2023		424,495
2024		433,872
2025		409,055
Thereafter		2,782,432
Total lease payments		5,626,321
Less: Interest		(1,957,343)
Less: Tenant improvement allowance	[1]	(1,212,000)
Present value of lease liabilities		2,456,978	$ 2,500,000
Finance
2021		281,914
2022		45,374
2023		3,364
2024		280
2025
Thereafter
Total lease payments		330,932
Less: Interest		(17,668)
Less: Tenant improvement allowance	[1]
Present value of lease liabilities		313,264
Total
2021		1,287,725
2022		616,030
2023		427,859
2024		434,152
2025		409,055
Thereafter		2,782,432
Total lease payments		5,957,253
Less: Interest		(1,975,011)
Less: Tenant improvement allowance	[1]	(1,212,000)
Present value of lease liabilities		$ 2,770,242

[1] In accordance with ASC 842, a tenant allowance should be included in the measurement of the consideration in the lease agreement at inception and reflected as a reduction to the right-of-use asset and a corresponding reduction to the right-use-liability if the lessee both controls the construction of the tenant improvements and the expects to fully earn all of the tenant allowance. OpGen has met both conditions at the inception of its Rockville, Maryland lease and has recorded the Tenant Improvement Allowance accordingly. As the cash for the Tenant Improvement Allowance is received from the lessor under the terms of the Rockville, Maryland lease, the corresponding right-of-use liability will increase and will be amortized as part of the right-of use asset and liability amortization over the term of the Rockville, Maryland Lease in accordance with ASC 842.