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3. Debt (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Debt Details      
Notes payable - original issue discount $ 225,000 $ 225,000 $ 400,000
Convertible notes payable 820,703 641,129 365,350
Test vehicle financing 50,656 61,811 77,075
Note payable - related party 237 237 22,910
Note payable - UPT minority owner 250,000 250,000 250,000
Total 1,346,596 1,178,177 1,115,335
Debt discount (352,511) (334,696) (339,629)
Total 994,085 843,481 775,706
Less: current portion (743,383) (825,170) (697,903)
Debt, long-term portion $ 250,702 $ 18,311 $ 77,803