Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of the Business - Additional Information (Details)

v3.10.0.1
Organization and Description of the Business - Additional Information (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 25, 2018
USD ($)
$ / shares
shares
Jun. 08, 2018
$ / shares
Jun. 30, 2018
USD ($)
Segment
shares
Dec. 31, 2017
USD ($)
shares
Organization And Description Of Business [Line Items]        
Number of operating segments | Segment     1  
Stockholders equity, reverse stock split     1-for-5.62  
Stockholders equity, stock split, conversion ratio     0.1779  
Minimum price post-split | $ / shares   $ 15.884    
Adjusted price post split | $ / shares   $ 7.942    
Net proceeds from issuance of common stock | $     $ 78,782  
Common stock, shares authorized     125,000,000 96,000,000
Preferred stock, shares authorized     10,000,000 0
Accumulated deficit | $     $ 37,750 $ 26,028
Minimum        
Organization And Description Of Business [Line Items]        
Sufficient cash and cash equivalents available period term     12 months  
IPO        
Organization And Description Of Business [Line Items]        
Common stock, shares, issued 5,750,000      
Common stock, shares issued, price per share | $ / shares $ 15.00      
Net proceeds from issuance of common stock | $ $ 77,600      
Payments of stock issuance costs | $ $ 8,600      
Convertible preferred stock converted into common stock 12,263,126      
Common stock, shares authorized 125,000,000      
Preferred stock, shares authorized 10,000,000      
Overallotment Option        
Organization And Description Of Business [Line Items]        
Common stock, shares, issued 750,000