Acquisitions (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 20, 2017	Mar. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Cash consideration before working capital adj		$ 8,750
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 8,431	$ 8,431
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		2,569
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 1,856
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 713
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Absolute Consulting, Inc. [Member]
Business Acquisition [Line Items]
Percentage of ownership interest acquired		100.00%
Business Acquisition, Name of Acquired Entity	Absolute Consulting, Inc.
Business Acquisition, Effective Date of Acquisition		Sep. 20, 2017
Cash purchase price		$ 9,521
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash		455
Contract receivables		5,121
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets		68
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment		184
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		2,569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		(78)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other		(1,617)
Identifiable Net assets acquired		6,702
Goodwill		2,819
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total		9,521
Business Combination, Acquired Receivables [Abstract]
Business Combination, Acquired Receivable, Fair Value		5,121
Business Combination, Acquired Receivables, Gross Contractual Amount		5,121
Business Combination, Acquired Receivables, Estimated Uncollectible		0
Business Acquisition, Goodwill, Expected Tax Deductible Amount		2,819
Cash consideration in escrow		$ 1,000