Quarterly report pursuant to Section 13 or 15(d)

Capital Stock - Additional Information (Details)

v3.7.0.1
Capital Stock - Additional Information (Details) - USD ($)
1 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Class Of Stock [Line Items]      
Reclassification of convertible preferred stock warrant liability into additional paid-in capital $ 5,700,000 $ 5,711,000  
Preferred stock, shares outstanding 0 0  
Common stock, shares authorized 500,000,000 500,000,000  
Common stock, par value $ 0.005 $ 0.005  
Common stock, voting rights   one  
Common stock, shares issued 9,593,192 9,593,192 1,616,996
Common stock, shares outstanding 9,593,192 9,593,192 1,616,996
Preferred stock, shares authorized 20,000,000 20,000,000  
Preferred stock, par value $ 0.005 $ 0.005  
Preferred stock, shares issued 0 0  
Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, shares outstanding 0 0  
Common Stock      
Class Of Stock [Line Items]      
Conversion of preferred stock into common stock, shares 4,689,753 4,689,753  
Conversion of preferred stock into common stock, value   $ 25,000  
Additional Paid-in Capital      
Class Of Stock [Line Items]      
Reclassification of convertible preferred stock warrant liability into additional paid-in capital $ 42,100,000 $ 42,100,000