ACCRUED EXPENSES AND OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2013	May 31, 2013
Accrued expenses:
Accrued compensation and benefits	$ 4,687	$ 4,270
Accrued satellite and ground costs	6,195	69
Accrued property and other taxes	4,053	4,702
Accrued customer liabilities and deposits	5,354	6,551
Accrued professional and other service provider fees	2,094	2,705
Accrued commissions	601	1,722
Accrued telecommunications expenses	705	1,284
Accrued inventory and tariffs	1,474	2,294
Short-term lease liability	2,501	1,330
Other accrued expenses	1,283	989
Accrued expenses	28,947	25,916
Summary of activity in the warranty reserve account:
Balance at beginning of period	212	186	$ 153
Provision	361	543	525
Utilization	(411)	(517)	(492)
Balance at end of period	162	212	$ 186
Non-current liabilities:
Employee benefit obligation	3,289	3,650
Asset retirement obligations	2,461	1,629
Compound embedded derivative with the 2013 8.00% Notes	1,364	123
Deferred tax liability	296	755
Deferred payroll taxes under CARES Act	0	423
Foreign tax contingencies	474	633
Other	3	8
Total other non-current liabilities	$ 7,887	$ 7,221
8.00% Convertible Senior Notes Issued in 2013
Non-current liabilities:
Debt instrument, interest rate	8.00%			8.00%	8.00%