Acquisitions, Consideration Paid For Acquisition (Details) $ in Thousands			2 Months Ended	3 Months Ended
	Feb. 15, 2019 USD ($) Company	May 11, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)		Dec. 31, 2018 USD ($)
Calculation of Adjusted Purchase Price [Abstract]
Fair value of contingent consideration				$ 1,200
Business Combination, Recognized Identifiable Assets Acquired, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 16,709	16,709			$ 13,170
Revenue				22,194	$ 22,895	[1]
Net (loss) Income				$ (4,236)	$ (1,496)
DP Engineering Ltd, CO. [Member]
Business Acquisition [Abstract]
Percentage of ownership interest acquired	100.00%
Business acquisition, name of acquired entity				DP Engineering Ltd, CO.
Business acquisition, effective date of acquisition				Feb. 15, 2019
Calculation of Adjusted Purchase Price [Abstract]
Base purchase price per agreement	$ 13,500
Pre closing working capital adjustment	155
Fair value of contingent consideration	1,200
Total purchase price	14,855
Acquisition [Abstract]
Total purchase price	14,855
Business Combination, Recognized Identifiable Assets Acquired, and Liabilities Assumed, Net [Abstract]
Cash	134
Contract receivables	2,934
Prepaid expenses and other current assets	209
Property, and equipment, net	210
Intangible assets	6,798
Other assets	1,806
Accounts payable and accrued expenses	(1,375)
Other liabilities	(1,494)
Total identifiable net assets	9,222
Goodwill	5,633
Net assets acquired	14,855
Tax deductible goodwill	5,633
Cash consideration in escrow	1,687
Proceeds from issuance of debt	14,263
Earn-out amount	$ 5,000
Period to satisfy indemnification claims	18 months
Number of large power generation companies | Company	2
Transaction costs			628	$ 628
Revenue			$ 1,581
True North Consulting, LLC [Member]
Business Acquisition [Abstract]
Percentage of ownership interest acquired		100.00%
Business acquisition, name of acquired entity				True North Consulting LLC
Business acquisition, effective date of acquisition				May 11, 2018
Calculation of Adjusted Purchase Price [Abstract]
Base purchase price per agreement		$ 9,750
Total purchase price		9,915
Acquisition [Abstract]
Total purchase price		9,915
Business Combination, Recognized Identifiable Assets Acquired, and Liabilities Assumed, Net [Abstract]
Cash		306
Contract receivables		1,870
Prepaid expenses and other current assets		8
Property, and equipment, net		1
Intangible assets		5,088
Accounts payable and accrued expenses		(1,744)
Accrued compensation		(353)
Total identifiable net assets		5,176
Goodwill		4,739
Net assets acquired		9,915
Tax deductible goodwill		4,739
Cash consideration in escrow		1,463
Proceeds from issuance of debt		$ 10,300
Period to satisfy indemnification claims		18 months

[1] Prior period amounts have not been adjusted under the modified retrospective transition method for the adoption of ASC 606.