Quarterly report pursuant to Section 13 or 15(d)

Description of business and summary of significant accounting policies - Additional Information (Details)

v3.5.0.2
Description of business and summary of significant accounting policies - Additional Information (Details)
9 Months Ended
Sep. 30, 2016
USD ($)
segment
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]      
Number of Operating Segments | segment 1    
Revenues, Bill And Hold $ 1,548,422 $ 747,328  
Loss on Contracts 163,505.91 $ 0  
Allowance for Doubtful Accounts Receivable, Current 44,000   $ 50,000
Inventory Valuation Reserves $ 203,000   $ 293,000