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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2016
Statement Of Financial Position [Abstract]  
Summary of Earn-Out Liability

 

 

Fair Value Measurements

(Level 3)

 

(in thousands)

Earn-out Liability

 

Balance at December 31, 2014

$

3,510

 

Remeasurement of obligation

 

—

 

Issuance of shares to settle earn-out obligation

 

(3,510

)

Balance at December 31, 2015

$

—

 

Remeasurement of obligation

 

—

 

Balance at December 31, 2016

$

—