Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Additional Information (Detail)

v3.7.0.1
Basis of Presentation (Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Basis Of Presentation [Line Items]              
Net Income (Loss) Attributable To Parent $ (4,070,099) $ (4,103,490)   $ (8,251,762) $ (7,879,229) $ 19,250,082 $ 13,427,478
Retained Earnings Accumulated Deficit (85,090,712)     (85,090,712)   (76,838,950)  
Proceeds from Issuance Initial Public Offering           $ 19,238,015  
Sales Revenue Net $ 1,325,261 $ 560,877   $ 2,535,924 $ 924,717    
Scenario, Forecast [Member]              
Basis Of Presentation [Line Items]              
Sales Revenue Net     $ 715,000        
Toshiba Japan [Member] | Sales Revenue, Net [Member]              
Basis Of Presentation [Line Items]              
Concentration Risk, Percentage       26.00% 0.00%    
Toshiba Japan [Member] | Accounts Receivable [Member]              
Basis Of Presentation [Line Items]              
Concentration Risk, Percentage       75.00% 0.00%