XML 59 R38.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Apr. 02, 2018
May 03, 2017
Apr. 26, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Class of Stock [Line Items]            
Common stock, shares authorized (in shares)       125,000,000 125,000,000  
Common stock, par value (in dollars per share)       $ 0.01 $ 0.01  
Proceeds from issuance of common stock, net of offering costs       $ 103,259 $ 34,244 $ 0
Undesignated Preferred Stock            
Class of Stock [Line Items]            
Undesignated preferred stock, shares authorized (in shares)       5,000,000    
Undesignated preferred stock, par value (in dollars per share)       $ 0.01    
Undesignated preferred stock, shares issued (in shares)       0 0  
Undesignated preferred stock, shares outstanding (in shares)       0 0  
Registered Direct Offering            
Class of Stock [Line Items]            
Issuance of common stock, net of offering costs (in shares)     1,100,000      
Number of shares issued or sold (in shares)     1,100,000      
Common stock purchase price (in dollars per share)     $ 21.50      
Proceeds from issuance of common stock, net of offering costs     $ 23,700      
At The Market Offering            
Class of Stock [Line Items]            
Issuance of common stock, net of offering costs (in shares)   599,284        
Number of shares issued or sold (in shares)   599,284        
Common stock maximum amount available for issuance   $ 75,000        
Proceeds of stock sale   $ 10,800        
Firm Commitment Public Underwritten Offer            
Class of Stock [Line Items]            
Sale of common stock (in shares) 4,500,000          
Sale of common stock (in dollars per share) $ 21.25          
Proceeds of stock sale $ 103,000          
Over-Allotment Option            
Class of Stock [Line Items]            
Sale of common stock (in shares) 675,000          
Sale of common stock (in dollars per share) $ 21.25