Goodwill

The changes in the carrying value of goodwill were as follows (in thousands):



	Amount
Balance as of December 31, 2016	$	95,280
Acquisition of ViDi Systems, S.A.	18,333
Acquisition of GVi Ventures, Inc.	1,476
Adjustment to EnShape goodwill	(1,881		)
Balance as of December 31, 2017	113,208
Balance as of December 31, 2018	$	113,208

Refer to Note 21 to the Consolidated Financial Statements for further information regarding acquisitions.

For its 2018 analysis of goodwill, management elected to perform a qualitative assessment. Based upon this assessment, management believes that it is more likely than not that the fair value of the reporting unit exceeds its carrying amount. Factors that management considered in the qualitative assessment include macroeconomic conditions, industry and market considerations, overall financial performance (both current and projected), changes in management or strategy, changes in the composition or carrying amount of net assets, and market capitalization.