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Business Acquisitions (Tables)
12 Months Ended
Dec. 31, 2017
Placemeter [Member]  
Business Acquisition [Line Items]  
Schedule of Business Acquisitions, by Acquisition
Cash and cash equivalents
$
8

Accounts receivable
11

Prepaid expenses and other current assets
130

Property and equipment
83

Intangibles
6,000

Goodwill
3,742

Accounts payable
(40
)
Other accrued liabilities
(74
)
Deferred tax liabilities
(308
)
Total purchase price
$
9,552