Leases - Summary of Operating and Financing Leases (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Lease cost
Operating lease cost	$ 324
Sublease income	(109)
Total	215
Other information
Operating cash flows out from operating leases	(324)
Operating cash flows in from operating leases	109
U.S. [Member]
Lease cost
Operating lease cost	214
Total	214
Other information
Operating cash flows out from operating leases	$ (214)
Weighted average remaining lease term	1 year 8 months 12 days
Weighted average discount rate - operating leases	8.00%
Ireland [Member]
Lease cost
Operating lease cost	$ 110
Sublease income	(109)
Total	1
Other information
Operating cash flows out from operating leases	(110)
Operating cash flows in from operating leases	$ 109
Weighted average discount rate - operating leases	8.00%