Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.10.0.1
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Class of Stock [Line Items]      
Common stock issued during the period, value   $ 3,600  
Common stock, outstanding   22,418,000 21,352,000
Preferred stock authorized to issue   5,000,000  
Preferred stock, shares outstanding   0  
Chief Executive Officer      
Class of Stock [Line Items]      
Common stock issued during the period 850,000    
Chief Financial Officer      
Class of Stock [Line Items]      
Common stock issued during the period 150,000    
Chief Executive Officer and Chief Financial Officer      
Class of Stock [Line Items]      
Common stock issued during the period, value $ 3,600    
Common stock, outstanding 9,670,386    
Common stock share outstanding owned 43.00%