Lease Arrangements - Components of Operating Lease Expense (Details) - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Line Items]
Operating lease cost	[1]	$ 168	$ 211	$ 328	$ 383
Amortization of operating lease assets		669	666	1,362	1,414
Interest on operating lease liabilities		201	231	416	473
Total lease cost		$ 1,038	$ 1,108	$ 2,106	$ 2,270

[1] Includes short-term leases and variable lease costs, which are not significant for the three and six months ended June 30, 2022 and 2021.