SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment reporting
Number of reportable segments | segment			3
Revenue
Revenue	$ 182,213	$ 166,760	$ 533,730	$ 415,135
Depreciation	33,312	28,875	100,421	68,693
Amortization of intangibles from acquisitions	3,236	3,480	9,744	4,324
Non-cash stock-based compensation	1,669	1,605	5,696	5,116
Operating income (loss)	1,439	(982)	3,272	5,271
Segment Assets
Cash, cash equivalents, and short term investments	77,014		77,014		$ 79,901
Total current assets	232,524		232,524		232,617
Fixed assets, net	949,807		949,807		943,209
Goodwill	40,104		40,104		40,104
Total assets	1,595,200		1,595,200		1,608,604
Total current liabilities	212,856		212,856		220,944
Total debt	399,188		399,188		366,544
Capital Expenditures
Capital expenditures			113,959	70,922
Communication services
Revenue
Revenue	173,977	155,298	512,315	378,897
Mobility
Revenue
Revenue	28,838	25,985	81,058	75,827
Mobility - Business
Revenue
Revenue	4,004	1,653	11,970	5,066
Mobility - Consumer
Revenue
Revenue	24,834	24,332	69,088	70,761
Fixed
Revenue
Revenue	110,219	94,584	324,062	224,705
Fixed - Business
Revenue
Revenue	51,087	38,230	144,348	76,446
Fixed - Consumer
Revenue
Revenue	59,132	56,354	179,714	148,259
Carrier services
Revenue
Revenue	34,580	34,496	106,144	77,676
Other communication services
Revenue
Revenue	340	233	1,051	689
Construction.
Revenue
Revenue	3,332	6,417	8,615	28,049
Other revenue
Revenue
Revenue	4,904	5,045	12,800	8,189
Renewable Energy
Revenue
Revenue				418
Managed Services
Revenue
Revenue	4,904	5,045	12,800	7,771
Corporate and Other
Revenue
Depreciation	845	1,240	2,766	3,827
Non-cash stock-based compensation	1,483	1,468	5,225	4,911
Operating income (loss)	(11,926)	(4,310)	(28,663)	(23,319)
Segment Assets
Cash, cash equivalents, and short term investments	5,274		5,274		7,628
Total current assets	6,466		6,466		8,614
Fixed assets, net	7,905		7,905		10,103
Total assets	67,977		67,977		83,567
Total current liabilities	27,989		27,989		20,548
Total debt	71,000		71,000		61,499
Capital Expenditures
Capital expenditures			633	2,280
International Telecom | Operating segments
Revenue
Revenue	90,007	85,306	265,197	255,342
Depreciation	14,126	13,308	43,109	40,080
Amortization of intangibles from acquisitions	380	418	1,192	1,262
Non-cash stock-based compensation	54	36	170	83
Operating income (loss)	13,360	13,213	36,889	40,999
Segment Assets
Cash, cash equivalents, and short term investments	38,340		38,340		43,128
Total current assets	110,610		110,610		108,677
Fixed assets, net	459,554		459,554		452,856
Goodwill	4,835		4,835		4,835
Total assets	641,307		641,307		630,515
Total current liabilities	84,848		84,848		91,090
Total debt	63,386		63,386		64,243
Capital Expenditures
Capital expenditures			53,270	32,485
International Telecom | Operating segments | Communication services
Revenue
Revenue	88,609	84,054	261,377	251,364
International Telecom | Operating segments | Mobility
Revenue
Revenue	26,482	23,845	75,022	68,420
International Telecom | Operating segments | Mobility - Business
Revenue
Revenue	3,706	1,422	10,997	3,917
International Telecom | Operating segments | Mobility - Consumer
Revenue
Revenue	22,776	22,423	64,025	64,503
International Telecom | Operating segments | Fixed
Revenue
Revenue	58,567	57,419	175,262	175,292
International Telecom | Operating segments | Fixed - Business
Revenue
Revenue	18,578	16,549	52,827	50,037
International Telecom | Operating segments | Fixed - Consumer
Revenue
Revenue	39,989	40,870	122,435	125,255
International Telecom | Operating segments | Carrier services
Revenue
Revenue	3,220	2,557	10,042	6,963
International Telecom | Operating segments | Other communication services
Revenue
Revenue	340	233	1,051	689
International Telecom | Operating segments | Other revenue
Revenue
Revenue	1,398	1,252	3,820	3,978
International Telecom | Operating segments | Managed Services
Revenue
Revenue	1,398	1,252	3,820	3,978
US Telecom | Operating segments
Revenue
Revenue	92,206	81,454	268,533	159,375
Depreciation	18,341	14,327	54,546	24,598
Amortization of intangibles from acquisitions	2,856	3,062	8,552	3,062
Non-cash stock-based compensation	132	101	301	100
Operating income (loss)	716	(9,830)	(4,199)	(10,920)
Segment Assets
Cash, cash equivalents, and short term investments	32,937		32,937		28,486
Total current assets	114,960		114,960		111,741
Fixed assets, net	482,348		482,348		480,250
Goodwill	35,269		35,269		35,269
Total assets	871,181		871,181		877,041
Total current liabilities	99,663		99,663		108,950
Total debt	264,802		264,802		240,802
Capital Expenditures
Capital expenditures			60,056	36,157
US Telecom | Operating segments | Communication services
Revenue
Revenue	85,368	71,244	250,938	127,533
US Telecom | Operating segments | Mobility
Revenue
Revenue	2,356	2,140	6,036	7,407
US Telecom | Operating segments | Mobility - Business
Revenue
Revenue	298	231	973	1,149
US Telecom | Operating segments | Mobility - Consumer
Revenue
Revenue	2,058	1,909	5,063	6,258
US Telecom | Operating segments | Fixed
Revenue
Revenue	51,652	37,165	148,800	49,413
US Telecom | Operating segments | Fixed - Business
Revenue
Revenue	32,509	21,681	91,521	26,409
US Telecom | Operating segments | Fixed - Consumer
Revenue
Revenue	19,143	15,484	57,279	23,004
US Telecom | Operating segments | Carrier services
Revenue
Revenue	31,360	31,939	96,102	70,713
US Telecom | Operating segments | Construction.
Revenue
Revenue	3,332	6,417	8,615	28,049
US Telecom | Operating segments | Other revenue
Revenue
Revenue	3,506	3,793	8,980	3,793
US Telecom | Operating segments | Managed Services
Revenue
Revenue	3,506	3,793	8,980	3,793
Renewable Energy | Operating segments
Revenue
Revenue				418
Depreciation				188
Non-cash stock-based compensation				22
Operating income (loss)	(711)	$ (55)	(755)	(1,488)
Segment Assets
Cash, cash equivalents, and short term investments	463		463		659
Total current assets	488		488		3,585
Total assets	14,735		14,735		17,481
Total current liabilities	$ 356		$ 356		$ 356
Renewable Energy | Operating segments | Other revenue
Revenue
Revenue				418
Renewable Energy | Operating segments | Renewable Energy
Revenue
Revenue				$ 418