Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Contingencies And Commitments [Line Items]
Operating lease liability	$ 345
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Liabilities
Operating lease right of use asset	$ 342	$ 988
Sublease income	0	0
Operating lease payments	$ 700
Operating lease, remaining lease term	6 months
Operating lease, discount rate	7.50%
Sale of SSL, Nov. 02, 2012 [Member] | Pre Closing Taxes Indemnification [Member]
Contingencies And Commitments [Line Items]
Indemnification refund receivable	$ 600
Indemnification refund received	1,800
Globalstar do Brasil S.A. [Member]
Contingencies And Commitments [Line Items]
Loss contingency accrual	$ 100	$ 100
Accounting Standards Update 2016-02 [Member]
Contingencies And Commitments [Line Items]
Operating lease liability			$ 300
Operating Lease, Liability, Statement of Financial Position [Extensible List]			Liabilities
Operating lease right of use asset			$ 300