Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Summary of Assets and Liabilities Measured at Fair Value Recurring and Nonrecurring Basis (Details)

v3.19.3
Fair Value Measurement - Summary of Assets and Liabilities Measured at Fair Value Recurring and Nonrecurring Basis (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Alternative fuel credits $ 352,625 $ 331,120
Marketable securities 3,032,399 2,878,664
Total assets 3,385,024 3,209,784
Warrants payable 8,610 5,965
Total liabilities 8,610 5,965
Level 1 [Member]    
Alternative fuel credits
Marketable securities 3,032,399 2,878,664
Total assets 3,032,399 2,878,664
Warrants payable
Total liabilities
Level 2 [Member]    
Alternative fuel credits 352,625 331,120
Marketable securities
Total assets 352,625 331,120
Warrants payable
Total liabilities
Level 3 [Member]    
Alternative fuel credits
Marketable securities
Total assets
Warrants payable 8,610 5,965
Total liabilities $ 8,610 $ 5,965