Business Acquisitions (Details) - USD ($) $ in Thousands			3 Months Ended
	Jul. 16, 2015	May. 05, 2015	Mar. 31, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 9,179	$ 9,596
MediaSolv Solutions Corporation
Business Acquisition [Line Items]
Consideration transferred		$ 8,800	1,000
Cash acquired		100
Payments to acquire businesses, net		7,800
Contingent liability		1,000
Additional earn-out provisions and compensation adjustments		$ 4,000
Intangible assets, weighted average useful life		6 years 6 months
Acquisition transaction costs		$ 200
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets		590
Inventory		35
Property and equipment		53
Intangible assets		4,145
Goodwill		5,477
Accounts payable and accrued liabilities		(697)
Deferred revenue		(111)
Deferred income tax liabilities, net		(669)
Total purchase price		$ 8,823
MediaSolv Solutions Corporation | Commission Expenses | Accrued Liabilities
Business Acquisition [Line Items]
Contingent liability			900
Tactical Safety Responses Limited
Business Acquisition [Line Items]
Consideration transferred	$ 3,334
Cash acquired	$ 700
Intangible assets, weighted average useful life	7 years
Acquisition transaction costs	$ 100
Cash payments to acquire business	4,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets	726
Inventory	497
Property and equipment	583
Intangible assets	881
Other Assets	20
Goodwill	1,608
Accounts payable and accrued liabilities	(207)
Notes payable	(169)
Deferred income tax liabilities, net	$ (605)
Tactical Safety Responses Limited | Commission Expenses | Accrued Liabilities
Business Acquisition [Line Items]
Contingent liability			$ 300