Other Current Assets (Schedule of Other Current Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Other Current Assets [Abstract]
Restricted cash (see Note 2)	$ 304	$ 304
Indemnification receivable from SSL for pre-closing taxes (see note 13)	598	598
Due from affiliates	59	88
Prepaid expenses	838	240
Other	2	2
Total other current assets	$ 1,801	$ 1,232