Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Feb. 28, 2020
Leases [Abstract]
Right-of-use-asset	$ 3,429		$ 3,618
Lease liability	3,479		$ 3,701
Operating lease expense	243	$ 251
Operating cash flows from leases	$ 262	$ 259
Weighted average remaining lease term	4 years 8 months 12 days		4 years 10 months 24 days
Weighted average discount rate	4.10%		4.10%
Maturity of Operating Lease Liabilities [Abstract]
2021	$ 709		$ 971
2022	880		879
2023	713		713
2024	718		718
2025	463		464
Thereafter	340		180
Total undiscounted lease payments	3,823		3,925
Less imputed interest	344		224
Total lease liabilities	$ 3,479		$ 3,701
Minimum [Member]
Leases [Abstract]
Remaining lease terms	1 year
Maximum [Member]
Leases [Abstract]
Remaining lease terms	6 years
Extension period for leases	5 years
Termination period for leases	1 year
Facility in Ithaca, New York [Member]
Leases [Abstract]
Extension period for leases	4 years
Right-of-use-asset				$ 1,500
Lease liability				1,500
Maturity of Operating Lease Liabilities [Abstract]
Total lease liabilities				$ 1,500