Business Acquisitions and Divestitures (Textual) (Details) - USD ($)		1 Months Ended							2 Months Ended	6 Months Ended	12 Months Ended						37 Months Ended	71 Months Ended
	Oct. 31, 2016	Dec. 31, 2015	Aug. 31, 2015	Oct. 31, 2014	Aug. 31, 2014	Feb. 28, 2014	Dec. 31, 2011	Feb. 28, 2010	Dec. 31, 2016	Jun. 30, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2015
Business Acquisition [Line Items]
Payments for business acquisition											$ 3,669,000	$ 520,000	$ 0
Contingent consideration, liability		$ 0							$ 4,000,000		4,000,000	0						$ 0
Value of shares issued in business acquisition													1,279,000	$ 1,472,000
Goodwill recorded in connection with business combinations												242,000
Goodwill		11,810,000							13,823,000		13,823,000	11,810,000	$ 13,036,000				$ 13,036,000	11,810,000
Etesius Limited [Member]
Business Acquisition [Line Items]
Payments for business acquisition								$ 3,100,000
Payment of contingent consideration					$ 200,000	$ 700,000												1,400,000
Business Strategy, Inc. [Member]
Business Acquisition [Line Items]
Contingent consideration, liability		0										$ 0						$ 0
Payment of contingent consideration																	6,300,000
Total estimated purchase price							$ 11,900,000									$ 11,900,000
Increase in contingent consideration liability							4,900,000										(1,400,000)
Revenue															$ 10,900,000	800,000
Loss from continuing operations															1,500,000	100,000
Business combination, adjustment to initial fair value accounting															12,200,000
Goodwill recorded in connection with business combinations															$ (200,000)
Business combination, decrease in fair value of purchase price																(200,000)
Goodwill							7,577,000									7,577,000
Goodwill, deductible for income tax purposes							1,500,000									1,500,000
Payment of contingent consideration, cash																	$ 3,600,000
Payment of contingent consideration, common stock (in shares)																	404,775
Payment of contingent consideration, common stock, amount																	$ 2,700,000
Total purchase price							11,919,000
Supplier Information Management [Member]
Business Acquisition [Line Items]
Total purchase price		700,000
Lavante [Member]
Business Acquisition [Line Items]
Total estimated purchase price	$ 3,700,000
Revenue									383,000
Loss from continuing operations									(891,000)
Goodwill	2,146,000
Goodwill, deductible for income tax purposes	0
Deferred Tax Assets, Goodwill and Intangible Assets	0
Total purchase price	$ 3,669,000
Initial payment [Member] | Etesius Limited [Member]
Business Acquisition [Line Items]
Payments for business acquisition								2,800,000
Initial payment [Member] | Business Strategy, Inc. [Member]
Business Acquisition [Line Items]
Payments for business acquisition							$ 2,800,000
Shares issued in business acquisition (in shares)							640,614
Value of shares issued in business acquisition							$ 3,700,000
Initial payment [Member] | Supplier Information Management [Member]
Business Acquisition [Line Items]
Payments for business acquisition		$ 500,000
Obligations [Member] | Etesius Limited [Member]
Business Acquisition [Line Items]
Payments for business acquisition								300,000
Deferred Payments [Member] | Etesius Limited [Member]
Business Acquisition [Line Items]
Contingent consideration, liability								$ 1,200,000
Contingent consideration, payment term								4 years
Potential Additional Variable Payments (Earn Out) [Member] | Etesius Limited [Member]
Business Acquisition [Line Items]
Contingent consideration, payment term								4 years
Contingent consideration, liability, maximum								$ 3,800,000
Additional payment [Member] | Business Strategy, Inc. [Member]
Business Acquisition [Line Items]
Payments for business acquisition										$ 700,000
Performance Requirement [Member] | Business Strategy, Inc. [Member]
Business Acquisition [Line Items]
Contingent consideration, payment term							2 years
Contingent consideration, liability, maximum							$ 5,500,000									5,500,000
Performance Requirement [Member] | Supplier Information Management [Member]
Business Acquisition [Line Items]
Contingent consideration, payment term		2 years
Contingent consideration, liability, maximum									$ 200,000		$ 200,000
Audit Claim Recovery [Member] | Business Strategy, Inc. [Member]
Business Acquisition [Line Items]
Contingent consideration, payment term							2 years
Contingent consideration, liability, maximum							$ 8,000,000.0									$ 8,000,000.0
Chicago, Illinois [Member] | Adjacent Services [Member]
Business Acquisition [Line Items]
Proceeds from sale of divested assets				$ 1,100,000
Loss on sale of divested assets (less than)				$ 100,000
Business Strategy, Inc. Assets [Member]
Business Acquisition [Line Items]
Loss on sale of divested assets (less than)			$ 1,600,000