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)

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Fair Value Measurement - Summary of Assets and Liabilities Measured at Fair Value Recurring and Nonrecurring Basis (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Alternative fuel credits $ 553,177 $ 476,992
Marketable securities 1,952,510 3,150,332
Total assets 2,505,687 3,627,324
Warrants payable 4,581 5,102
Total liabilities 4,581 5,102
Level 1 [Member]    
Alternative fuel credits
Marketable securities 1,952,510 3,150,332
Total assets 1,952,510 3,150,332
Warrants payable
Total liabilities
Level 2 [Member]    
Alternative fuel credits 553,177 476,992
Marketable securities
Total assets 553,177 476,992
Warrants payable
Total liabilities
Level 3 [Member]    
Alternative fuel credits
Marketable securities
Total assets
Warrants payable 4,581 5,102
Total liabilities $ 4,581 $ 5,102