Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Additional Information (Detail)

v3.8.0.1
Basis of Presentation (Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 14, 2017
Dec. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Basis Of Presentation [Line Items]                
Net Income (Loss) Attributable To Parent     $ (5,502,242) $ (5,035,861) $ (13,754,038) $ (12,915,091) $ 19,250,082 $ 13,427,478
Retained Earnings Accumulated Deficit     (90,592,988)   (90,592,988)   (76,838,950)  
Proceeds from Issuance Initial Public Offering             19,238,015  
Sales Revenue Net     1,405,100 $ 582,549 3,941,025 1,507,266    
Stock Issued During Period, Shares, New Issues 1,490,000              
Shares Issued, Price Per Share $ 5.75              
Proceeds from Issuance of Common Stock $ 7,978,321       8,567,500 $ 6,612,500    
Subscription Receivable from Officer $ 61,000   61,000   61,000   $ 0  
Supply Commitment, Remaining Minimum Amount Committed     $ 5,000,000   $ 5,000,000      
Chief Operating Officer [Member]                
Basis Of Presentation [Line Items]                
Stock Issued During Period, Shares, New Issues 10,000              
Shares Issued, Price Per Share $ 6.10              
Scenario, Forecast [Member]                
Basis Of Presentation [Line Items]                
Sales Revenue Net   $ 221,000            
Toshiba Japan [Member] | Sales Revenue, Net [Member]                
Basis Of Presentation [Line Items]                
Concentration Risk, Percentage         24.00% 0.00%    
Toshiba Japan [Member] | Accounts Receivable [Member]                
Basis Of Presentation [Line Items]                
Concentration Risk, Percentage         59.00% 0.00%