Leases (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) Lease	Jun. 30, 2019 USD ($)	Feb. 28, 2020 USD ($)
Leases [Abstract]
Number of leases extended | Lease			1
Right-of-use-asset	$ 3,970	$ 2,855	$ 3,970
Lease liability	4,119	3,049	4,119
Operating lease expense	$ 241	$ 254	492	$ 509
Cash Flows Related to Operating Leases [Abstract]
Operating cash flows from leases			$ 519	$ 515
Operating Lease Weighted Average Remaining Lease Term and Discount Rate [Abstract]
Weighted average remaining lease term	5 years 4 months 24 days	5 years	5 years 4 months 24 days
Weighted average discount rate	4.10%	3.70%	4.10%
Maturity of Operating Lease Liabilities [Abstract]
2020	$ 519	$ 1,042	$ 519
2021	967	711	967
2022	875	434	875
2023	709	268	709
2024	714	273	714
Thereafter	797	616	797
Total undiscounted lease payments	4,581	3,344	4,581
Less imputed interest	462	295	462
Total lease liabilities	$ 4,119	$ 3,049	$ 4,119
Minimum [Member]
Leases [Abstract]
Remaining lease terms	1 year		1 year
Maximum [Member]
Leases [Abstract]
Remaining lease terms	7 years		7 years
Extension period for leases	5 years		5 years
Termination period for leases			1 year
Facility in Ithaca, New York [Member]
Leases [Abstract]
Extension period for leases	4 years		4 years
Right-of-use-asset					$ 1,500
Lease liability					1,500
Maturity of Operating Lease Liabilities [Abstract]
Total lease liabilities					$ 1,500