Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.8.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
8 Months Ended 12 Months Ended
Aug. 09, 2016
Jun. 28, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Howard Yeatons Service [Member]          
Related Party Transaction [Line Items]          
Payments for fees     $ 0 $ 0 $ 61,848
Other Financial Advisory and Accounting Services [Member]          
Related Party Transaction [Line Items]          
Payments for fees     $ 0 $ 13,306 $ 88,813
Dialog Semiconductor Plc [Member]          
Related Party Transaction [Line Items]          
Equity method investment, ownership percentage     7.70%    
Percentage of common shares potentially own outstanding shares     13.20%    
Private Placement [Member]          
Related Party Transaction [Line Items]          
Stock issued during period, value, new issues $ 20,000,000        
Private Placement [Member] | Dialog Semiconductor Plc [Member]          
Related Party Transaction [Line Items]          
Stock issued during period, value, new issues   $ 1,739,691      
Private Placement [Member] | Warrants Issued to Private Investors [Member] | Dialog Semiconductor Plc [Member]          
Related Party Transaction [Line Items]          
Class of warrant or right, number of securities called by warrants or rights   1,417,565      
Research and Development Expense [Member] | Dialog Semiconductor Plc [Member]          
Related Party Transaction [Line Items]          
Payments for fees     $ 516,725