SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment reporting
Number of reportable segments | segment			3
Revenue
Revenue	$ 179,497	$ 123,865	$ 351,517	$ 248,375
Depreciation	33,817	19,739	67,109	39,849
Amortization of intangibles from acquisitions	3,250	416	6,508	813
Non-cash stock-based compensation	2,568	2,175	4,028	3,511
Operating income (loss)	1,722	2,905	1,833	6,254
Segment Assets
Cash, cash equivalents, and short term investments	71,361		71,361		$ 79,901
Total current assets	224,280		224,280		232,617
Fixed assets, net	940,273		940,273		943,209
Goodwill	40,104		40,104		40,104
Total assets	1,595,754		1,595,754		1,608,604
Total current liabilities	203,784		203,784		220,944
Total debt	396,647		396,647		366,544
Capital Expenditures
Capital expenditures			75,098	41,932
Communication services
Revenue
Revenue	171,795	112,964	338,338	223,599
Mobility
Revenue
Revenue	26,804	25,161	52,220	49,842
Mobility - Business
Revenue
Revenue	3,976	1,640	7,965	3,413
Mobility - Consumer
Revenue
Revenue	22,828	23,521	44,255	46,429
Fixed
Revenue
Revenue	109,381	65,003	213,843	130,121
Fixed - Business
Revenue
Revenue	48,862	18,886	93,261	38,216
Fixed - Consumer
Revenue
Revenue	60,519	46,117	120,583	91,905
Carrier services
Revenue
Revenue	35,174	22,561	71,565	43,180
Other communication services
Revenue
Revenue	436	239	710	456
Construction.
Revenue
Revenue	3,297	9,325	5,283	21,632
Other revenue
Revenue
Revenue	4,405	1,576	7,896	3,144
Renewable Energy
Revenue
Revenue				418
Managed Services
Revenue
Revenue	4,405	1,576	7,896	2,726
Corporate and Other
Revenue
Depreciation	980	1,286	1,933	2,586
Non-cash stock-based compensation	2,433	2,165	3,743	3,442
Operating income (loss)	(9,621)	(10,411)	(16,658)	(19,009)
Segment Assets
Cash, cash equivalents, and short term investments	7,889		7,889		7,628
Total current assets	8,028		8,028		8,614
Fixed assets, net	8,585		8,585		10,103
Total assets	84,061		84,061		83,567
Total current liabilities	26,587		26,587		20,548
Total debt	78,000		78,000		61,499
Capital Expenditures
Capital expenditures			424	1,297
International Telecom | Operating segments
Revenue
Revenue	88,406	86,218	175,191	170,036
Depreciation	15,074	13,374	28,971	26,803
Amortization of intangibles from acquisitions	394	416	812	813
Non-cash stock-based compensation	56	10	116	47
Operating income (loss)	11,646	14,643	23,450	27,786
Segment Assets
Cash, cash equivalents, and short term investments	36,472		36,472		43,128
Total current assets	107,004		107,004		108,677
Fixed assets, net	453,245		453,245		452,856
Goodwill	4,835		4,835		4,835
Total assets	632,399		632,399		630,515
Total current liabilities	85,703		85,703		91,090
Total debt	63,378		63,378		64,243
Capital Expenditures
Capital expenditures			33,870	21,843
International Telecom | Operating segments | Communication services
Revenue
Revenue	87,160	84,642	172,769	167,310
International Telecom | Operating segments | Mobility
Revenue
Revenue	24,954	22,754	48,540	44,575
International Telecom | Operating segments | Mobility - Business
Revenue
Revenue	3,675	1,298	7,291	2,495
International Telecom | Operating segments | Mobility - Consumer
Revenue
Revenue	21,279	21,456	41,249	42,080
International Telecom | Operating segments | Fixed
Revenue
Revenue	58,349	59,126	116,696	117,873
International Telecom | Operating segments | Fixed - Business
Revenue
Revenue	16,996	16,855	34,250	33,488
International Telecom | Operating segments | Fixed - Consumer
Revenue
Revenue	41,353	42,271	82,446	84,385
International Telecom | Operating segments | Carrier services
Revenue
Revenue	3,421	2,523	6,823	4,406
International Telecom | Operating segments | Other communication services
Revenue
Revenue	436	239	710	456
International Telecom | Operating segments | Other revenue
Revenue
Revenue	1,246	1,576	2,422	2,726
International Telecom | Operating segments | Managed Services
Revenue
Revenue	1,246	1,576	2,422	2,726
US Telecom | Operating segments
Revenue
Revenue	91,091	37,647	176,326	77,921
Depreciation	17,763	5,079	36,205	10,272
Amortization of intangibles from acquisitions	2,856		5,696
Non-cash stock-based compensation	79		169
Operating income (loss)	(281)	(556)	(4,914)	(1,090)
Segment Assets
Cash, cash equivalents, and short term investments	26,867		26,867		28,486
Total current assets	108,005		108,005		111,741
Fixed assets, net	478,443		478,443		480,250
Goodwill	35,269		35,269		35,269
Total assets	864,324		864,324		877,041
Total current liabilities	91,138		91,138		108,950
Total debt	255,269		255,269		240,802
Capital Expenditures
Capital expenditures			40,804	18,792
US Telecom | Operating segments | Communication services
Revenue
Revenue	84,635	28,322	165,569	56,289
US Telecom | Operating segments | Mobility
Revenue
Revenue	1,850	2,407	3,681	5,267
US Telecom | Operating segments | Mobility - Business
Revenue
Revenue	301	342	674	918
US Telecom | Operating segments | Mobility - Consumer
Revenue
Revenue	1,549	2,065	3,006	4,349
US Telecom | Operating segments | Fixed
Revenue
Revenue	51,032	5,877	97,147	12,248
US Telecom | Operating segments | Fixed - Business
Revenue
Revenue	31,866	2,031	59,011	4,728
US Telecom | Operating segments | Fixed - Consumer
Revenue
Revenue	19,166	3,846	38,136	7,520
US Telecom | Operating segments | Carrier services
Revenue
Revenue	31,753	20,038	64,742	38,774
US Telecom | Operating segments | Construction.
Revenue
Revenue	3,297	9,325	5,283	21,632
US Telecom | Operating segments | Other revenue
Revenue
Revenue	3,159		5,474
US Telecom | Operating segments | Managed Services
Revenue
Revenue	3,159		5,474
Renewable Energy | Operating segments
Revenue
Revenue				418
Depreciation				188
Non-cash stock-based compensation				22
Operating income (loss)	(22)	$ (771)	(45)	(1,433)
Segment Assets
Cash, cash equivalents, and short term investments	133		133		659
Total current assets	1,243		1,243		3,585
Total assets	14,970		14,970		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