Basis of Presentation (Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Money Market Funds [Member] | Level 1 [Member]
Assets, Fair Value
Cash and cash equivalents	$ 80,658	$ 256,915
Money Market Funds [Member] | Level 2 [Member]
Assets, Fair Value
Cash and cash equivalents	0	0
Money Market Funds [Member] | Level 3 [Member]
Assets, Fair Value
Cash and cash equivalents	0	0
Sale of SSL, Nov. 02, 2012 [Member] | Level 1 [Member]
Assets, Fair Value
Indemnification - sale of SSL	0	0
Sale of SSL, Nov. 02, 2012 [Member] | Level 2 [Member]
Assets, Fair Value
Indemnification - sale of SSL	0	0
Sale of SSL, Nov. 02, 2012 [Member] | Level 3 [Member]
Assets, Fair Value
Indemnification - sale of SSL	598	598
Globalstar do Brasil S.A. [Member] | Level 1 [Member]
Liabilities, Fair Value
Indemnification - Globalstar do Brasil S.A.	0	0
Globalstar do Brasil S.A. [Member] | Level 2 [Member]
Liabilities, Fair Value
Indemnification - Globalstar do Brasil S.A.	0	0
Globalstar do Brasil S.A. [Member] | Level 3 [Member]
Liabilities, Fair Value
Indemnification - Globalstar do Brasil S.A.	$ 145	$ 145