Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Contingencies And Commitments [Line Items]
Sublease income	$ 0	$ 0		$ 0	$ 0
Operating lease payments				$ 500
Operating lease, term of contract	3 months			3 months
Operating lease, discount rate	7.50%			7.50%
General and Administrative Expense [Member]
Contingencies And Commitments [Line Items]
Severance and related costs	$ 7,200
Sale of SSL, Nov. 02, 2012 [Member] | Pre Closing Taxes Indemnification [Member]
Contingencies And Commitments [Line Items]
Indemnification refund receivable	600			$ 600		$ 600
Indemnification refund received			$ 1,800
Globalstar do Brasil S.A. [Member]
Contingencies And Commitments [Line Items]
Loss contingency accrual	$ 100			$ 100		$ 100