Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Previously Reported [Member] Common Stock [Member]		Previously Reported [Member] Additional Paid-in Capital [Member]	[1]	Previously Reported [Member] Retained Earnings [Member]	[1]	Previously Reported [Member] AOCI Attributable to Parent [Member]	[1]	Previously Reported [Member]	[1]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2016	[1]											10,461,574
Balances at Dec. 31, 2016	[1]											$ 14,460	$ 2,858	$ 20,400	$ 100	$ 37,818
Exercise of stock options (in shares)												172,759				172,759
Exercise of stock options												$ 908	(686)			$ 222
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(50,454)				(50,454)
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration													(1,462)			$ (1,462)
Stock-based compensation (note 14)													1,457			1,457
Net income for the period														22,327		22,327
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.														(51)		(51)
Other comprehensive income (loss) (note 7)															(100)	(100)
Balances at Dec. 31, 2017	[1]											15,368	2,167	42,676		60,211
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.														(51)		$ (51)
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(50,454)				(50,454)
Repurchase and retirement of shares (note 13(a)) (in shares)
Repurchase and retirement of shares (note 13(a))
Net income														22,327		22,327
Other comprehensive income (loss) (note 7)															(100)	$ (100)
Balances (in shares) at Dec. 31, 2017	[1]											10,583,879
Exercise of stock options (in shares)												63,886				63,886
Exercise of stock options												$ 455	(343)			$ 112
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(19,777)				(19,777)
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration													(445)			$ (445)
Stock-based compensation (note 14)													2,574			2,574
Net income for the period														17,135		17,135	[2],[3]
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.														(64)		(64)
Other comprehensive income (loss) (note 7)															(810)	(810)
Balances at Dec. 31, 2018		$ 15,823	[1]	$ 3,953		$ 60,810		$ (810)		$ 79,776						79,776	[4]
Adoption of Topic 606 (note 2(v)) at Dec. 31, 2017														1,063		1,063
Adjusted balance at Dec. 31, 2017												15,368	2,167	43,739		61,274
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.														(64)		$ (64)
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(19,777)				(19,777)
Repurchase and retirement of shares (note 13(a)) (in shares)
Repurchase and retirement of shares (note 13(a))
Net income														17,135		17,135	[2],[3]
Other comprehensive income (loss) (note 7)															(810)	$ (810)
Balances (in shares) at Dec. 31, 2018	[1]	10,627,988
Exercise of stock options (in shares)												80,319				80,319
Exercise of stock options												$ 967	(572)			$ 395
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(21,332)				(21,332)
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration													(548)			$ (548)
Stock-based compensation (note 14)													2,876			2,876
Net income for the period														15,398		15,398
Other comprehensive income (loss) (note 7)															1,283	1,283
Balances at Dec. 31, 2019												$ 16,633	880	76,208	473	$ 94,194
Shares deducted from exercise of stock options for payment of withholding taxes and exercise consideration (in shares)												(21,332)				(21,332)
Repurchase and retirement of shares (note 13(a)) (in shares)												(101,816)				(101,816)
Repurchase and retirement of shares (note 13(a))												$ (157)	(4,829)			$ (4,986)
Net income														15,398		15,398
Other comprehensive income (loss) (note 7)															$ 1,283	$ 1,283
Balances (in shares) at Dec. 31, 2019												10,585,159

[1] The Company has initially applied ASC 2014-09 (Topic 606) on January 1, 2018 and ASC 2016-02 (Topic 842) on January 1, 2019 (note 2(v)). Both accounting standards were adopted using the modified retrospective method, under this method the comparative periods were not restated.

[2] The Company has initially applied ASC 2014-09 (Topic 606) on January 1, 2018 and ASC 2016-02 (Topic 842) on January 1, 2019. Both accounting standards were adopted using the modified retrospective method, under this method the comparative periods were not restated.

[3] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 using the modified retrospective method (note 2(v)). Under this method, the comparative information is not restated.

[4] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 using the modified retrospective method (note 2(v)). Under this method, the comparative information is not restated.