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Sales, Billings, and Costs on Uncompleted Contracts (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Cost of Revenue, Total                   $ 485,000 $ 50,000
Gross Profit   $ (77,000) $ 213,000 $ 0 $ 0 $ 11,000 $ 0 $ 0 $ 0 $ 136,000 $ 11,000
California oil producer [Member]                      
Proceeds From Contract     260,000                
Contract Expenses       144,000              
Cost of Revenue, Total $ 421,000     64,000              
Gross Profit 60,000     196,000              
Conditional Contract Gross Profit 626,000     $ 52,000              
Contract Value     $ 900,000                
Contract Expiration Period                   6 months  
Contract Billings Cost   360,000               $ 360,000  
Costs in Excess of Billings   $ 115,000               $ 115,000  
Contract Revenue Cost 566,000                    
Payment of Contract $ 361,000