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
Mar. 31, 2017
Mar. 31, 2016
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Basis Of Presentation [Line Items]          
Net Income (Loss) Attributable To Parent $ (4,181,812) $ (3,775,739)   $ 19,250,082 $ 13,427,478
Long-Term Debt 518,374     1,416,480  
Retained Earnings Accumulated Deficit (81,020,762)     (76,838,950)  
Proceeds from Issuance Initial Public Offering       19,238,015  
Sales Revenue Net $ 1,210,663 $ 363,839      
Scenario, Forecast [Member]          
Basis Of Presentation [Line Items]          
Sales Revenue Net     $ 905,000    
Convertible Debt [Member]          
Basis Of Presentation [Line Items]          
Long-Term Debt       $ 547,990  
Debt Instrument, Convertible, Conversion Price $ 2.25        
Debt Instrument, Maturity Date Jun. 03, 2017        
Toshiba Japan [Member] | Sales Revenue, Net [Member]          
Basis Of Presentation [Line Items]          
Concentration Risk, Percentage 20.00% 0.00%      
Toshiba Japan [Member] | Accounts Receivable [Member]          
Basis Of Presentation [Line Items]          
Concentration Risk, Percentage 75.00% 0.00%