Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		16 Months Ended
	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash flows provided by operating activities:
Net loss		$ (36,333)	$ (38,223)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion		24,116	23,817
Change in fair value of derivatives		1,129	821
Stock-based compensation expense		1,090	1,280
Amortization of deferred financing costs		1,166	1,861
Provision for credit losses		420	721
Noncash interest and accretion expense		8,275	9,250
Unrealized foreign currency loss		4,270	8,942
Other, net		(96)	19
Changes in operating assets and liabilities:
Accounts receivable		(6,930)	(2,559)
Inventory		453	174
Prepaid expenses and other current assets		(77)	3,452
Other assets		531	(953)
Accounts payable and accrued expenses		4,326	(1,598)
Payables to affiliates		(277)	120
Other non-current liabilities		(83)	(10)
Deferred revenue		2,532	(2,509)
Net cash provided by operating activities		4,512	4,605
Cash flows used in investing activities:
Network upgrades (including capitalized interest)		(3,093)	(151)
Property and equipment additions		(1,212)	(1,067)
Purchase of intangible assets		(669)	(360)
Net cash used in investing activities		(4,974)	(1,578)
Cash flows provided by (used in) financing activities:
Principal payments of the First Lien Facility Agreement		(4,357)	(276)
Proceeds from exercise of warrants	$ 3,600	43,678	0	$ 47,300
Payments for debt and equity issuance costs		(133)	(145)
Proceeds from issuance of common stock and exercise of options		57	0
Net cash provided by (used in) financing activities		39,245	(421)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(66)	(155)
Net increase in cash, cash equivalents and restricted cash		38,717	2,451
Cash, cash equivalents and restricted cash, beginning of period		68,023	59,128
Cash, cash equivalents and restricted cash, end of period	59,128	106,740	61,579	106,740
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents					$ 8,369	$ 13,330
Restricted cash					98,371	54,693
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 59,128	68,023	61,579	$ 106,740	$ 106,740	$ 68,023
Supplemental disclosure of cash flow information:
Cash paid for interest		40	41
Supplemental disclosure of non-cash financing and investing activities:
Increase in capitalized accrued interest for network upgrades		447	454
Capitalized accretion of debt discount and amortization of prepaid financing costs		122	130
Principal amount of Loan Agreement with Thermo converted into common stock		0	137,366
Reduction of debt discount and issuance costs due to conversion of Loan Agreement with Thermo		0	17,963
Fair value of common stock issued upon conversion of Loan Agreement with Thermo		0	84,059
Reduction in derivative liability due to conversion of Loan Agreement with Thermo		$ 0	$ 1,058