Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.10.0.1
Stockholders' Equity - Additional Information (Detail)
 1 Months Ended 9 Months Ended
Aug. 17, 2018
USD ($)
Jul. 05, 2017
USD ($)
Jun. 28, 2017
$ / shares
shares
Dec. 30, 2016
USD ($)
$ / shares
shares
Nov. 07, 2016
USD ($)
$ / shares
shares
Aug. 09, 2016
USD ($)
$ / shares
shares
Apr. 24, 2015
USD ($)
Jan. 31, 2018
USD ($)
Jul. 31, 2017
USD ($)
Nov. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2018
USD ($)
Vote
Sep. 30, 2017
USD ($)
Class of Stock [Line Items]                        
Number of common stock voting entitlement per share | Vote                     1  
Shelf registration statement expiration date             2018-04          
Proceeds from issuance of common stock                     $ 38,846,815 $ 14,932,547
Dialog Semiconductor Plc [Member]                        
Class of Stock [Line Items]                        
Class of warrant or right, exercise price of warrants or rights | $ / shares     $ 19.9766   $ 17.0257              
Dialog Semiconductor Plc [Member] | Common Stock [Member]                        
Class of Stock [Line Items]                        
Class of warrant or right, number of securities called by warrants or rights | shares     654,013   763,552              
Dialog Semiconductor Plc [Member] | Warrant Issued to Private Investors [Member]                        
Class of Stock [Line Items]                        
Stock issued during period, shares, new issues | shares     976,139   763,552              
Stock issued during period, value, new issues   $ 14,999,935     $ 10,000,011              
Consummation of Offering Under Shelf Registration [Member]                        
Class of Stock [Line Items]                        
Proceeds from shelf registration debt or equity securities $ 75,000,000           $ 75,000,000          
Stock issued during period, shares, new issues | shares                   3,000,005    
Share price | $ / shares                   $ 6.90    
Proceeds from issuance of common stock                   $ 19,333,032    
Common stock, discount on shares                   1,242,002    
Stock offering expenses on issue of common stock                   125,000    
Additional stock offering expenses on issue of common stock                   284,576    
Proceeds from issuance of common stock net off offering expenses and discount                   $ 19,048,456    
At-the-Market [Member]                        
Class of Stock [Line Items]                        
Proceeds from issuance of common stock                     $ 38,846,815  
Stock issued during period, value, new issues               $ 38,846,815        
Underwriter’s discount and issuance costs               $ 1,153,715        
Private Placements [Member]                        
Class of Stock [Line Items]                        
Proceeds from issuance of common stock                 $ 14,932,547      
Stock issued during period, value, new issues           $ 20,000,000            
Class of warrant or right, exercise price of warrants or rights | $ / shares           $ 23.00            
Private Placements [Member] | Ascend Legemd Master Fund                        
Class of Stock [Line Items]                        
Stock issued during period, shares, new issues | shares           1,618,123            
Share price | $ / shares           $ 12.36            
Class of warrant or right, number of securities called by warrants or rights | shares           1,618,123            
Private Placements [Member] | Dialog Semiconductor Plc [Member]                        
Class of Stock [Line Items]                        
Share price | $ / shares     $ 15.3666   $ 13.0967              
Private Placements [Member] | JT Group [Member]                        
Class of Stock [Line Items]                        
Stock issued during period, shares, new issues | shares       292,056                
Share price | $ / shares       $ 17.12                
Stock issued during period, value, new issues       $ 4,999,975