Basis of Presentation (Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Money Market Funds [Member] \| Level 1 [Member]
Assets, Fair Value
Cash and cash equivalents	$ 251,244	$ 256,915
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 3 [Member]
Liabilities, Fair Value
Indemnification - Globalstar do Brasil S.A.	$ 145	$ 145

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

No definition available.

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant