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Note 10 - Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Year ended December 31,
		2018				2017				2016

Network Access Services:
Mobile Services		$	89,340			$	83,885			$	70,127
Other Services			7,984				5,567				4,179
Total Network Access Services			97,324				89,452				74,306

Domain Services:
Wholesale
Domain Services			189,434				183,731				89,010
Value Added Services			17,756				17,832				8,642
Total Wholesale			207,190				201,563				97,652

Retail			34,524				31,649				14,630
Portfolio			6,975				6,757				3,231
Total Domain Services			248,689				239,969				115,513

		$	346,013			$	329,421			$	189,819

Schedule of Cost of Revenues by Revenue Stream [Table Text Block]

		Year ended December 31,
			2018			2017				2016

Network Access Services:
Mobile Services		$	46,061			$	45,335			$	35,915
Other Services			3,994				3,305				1,910
Total Network Access Services			50,055				48,640				37,825

Domain Services:
Wholesale
Domain Services			160,216				161,013				72,948
Value Added Services			3,154				2,450				2,032
Total Wholesale			163,370				163,463				74,980

Retail			17,725				17,346				6,766
Portfolio			953				1,151				616
Total Domain Services			182,048				181,960				82,362

Network Expenses:
Network, other costs			9,846				9,324				5,210
Network, depreciation and amortization costs			7,294				4,976				1,368
			17,140				14,300				6,578

		$	249,243			$	244,900			$	126,765

Contract with Customer, Asset and Liability [Table Text Block]

		Year ended December 31, 2018

Balance, beginning of period		$	160,582
Deferred revenue			222,208
Recognized revenue (1)			(239,096	)
Balance, end of period		$	143,694

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

			Year ended December 31, 2018

2019			$	116,398
2020				12,751
2021				5,498
2022				3,456
2023				2,163
Thereafter				3,074

Total			$	143,340