Quarterly report pursuant to Section 13 or 15(d)

Organization and Nature of Operations - Additional Information (Details)

v3.10.0.1
Organization and Nature of Operations - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Oct. 01, 2018
Sep. 30, 2018
Sep. 30, 2017
Jul. 14, 2018
Jul. 13, 2018
Dec. 31, 2017
Subsidiary Sale Of Stock [Line Items]            
Common stock, par value   $ 0.0001   $ 0.0001   $ 0.0001
Common stock, shares authorized   25,000,000   25,000,000 10,000,000 25,000,000
Common stock issued, shares   316,080        
Proceeds from issuance of common stock   $ 7,901 $ 1,377      
Offering costs   $ 657        
Subsequent Event [Member] | IPO [Member]            
Subsidiary Sale Of Stock [Line Items]            
Common stock issued, shares 4,485,000          
Common stock, offering price per share $ 17.00          
Gross proceeds from issuance of IPO $ 76,200          
Proceeds from issuance of common stock 67,300          
Underwriting discount 5,300          
Offering costs $ 3,600          
Subsequent Event [Member] | Over-Allotment Option [Member]            
Subsidiary Sale Of Stock [Line Items]            
Common stock issued, shares 585,000