Subsequent Events - Second Amendment to Forbearance Agreement and Omnibus Amendment to Loan Agreement - Additional Information (Details)		9 Months Ended	12 Months Ended
	Oct. 20, 2020 USD ($) $ / shares shares	Sep. 30, 2019	Dec. 31, 2020 USD ($) Tractor shares	Jan. 01, 2021 $ / shares shares	Oct. 19, 2020 $ / shares shares	Oct. 15, 2019 $ / shares
CNG Tractors [Member]
Subsequent Event [Line Items]
Warrants, exercise price | $ / shares						$ 2.50
Omnibus Amendment [Member]
Subsequent Event [Line Items]
Debt instrument, covenant description		(i) The Company was required to either (a) fully consummate the acquisition by EVO Equipment Leasing, LLC of 89 used CNG tractors on or before December 31, 2020 or (b) issue 1,174,800 shares of the Company’s common stock to the lenders.   The Company did not fully consummate the acquisition of the used CNG tractors by December 31, 2020 and was required to issue the 1,174,800 shares of the Company’s common stock to the lenders.     (ii) The Company was required to issue to each of the lenders ratably warrants authorizing such lender to, on or after January 1, 2021, purchase its ratable share of up to 500,000 shares of the voting common stock of the Company at the price of $0.01 per share with a 10 year expiration.  If the Company or any of its subsidiaries had not repaid or partially repaid the obligations with the net proceeds (in the amount of at least $25.0 million) of a financing under the “Main Street Lending Program” on or before December 31, 2020, then the Company was required to issue an additional 1,000,000 warrants to the lenders.   The Company had not repaid the $25.0 million by December 31, 2020 and was therefore required to issue warrants to purchase an aggregate of 1,500,000 shares of the Company’s common stock to the lenders.         (iii) All warrants previously issued to lenders, at the election of the lender holding same, will be exchanged without any cash consideration for warrants to purchase for $0.01 per share voting common stock of the Company at the rate of 0.64 warrants for shares of voting common stock of the Company.   As a result, warrants to purchase an aggregate of 7,925,000 shares of the Company’s common stock at a price of $2.50 per share were exchanged for an aggregate of 5,072,000 shares of the Company’s common stock at a price of $0.01 per share.
Forecast [Member] | Omnibus Amendment [Member]
Subsequent Event [Line Items]
Common stock shares to be issued to lenders			1,174,800
Warrants to purchase voting common stock shares				500,000
Warrants, exercise price | $ / shares	$ 0.01			$ 0.01	$ 2.50
Class of warrant or rights, exercisable term				10 years
Additional warrants to be issued			1,000,000
Class of warrant to purchase number of common stock			1,500,000		7,925,000
Warrants to purchase number of common stock shares exchange rate	64.00%
Common stock	5,072,000
Forecast [Member] | Omnibus Amendment [Member] | Main Street Loan [Member]
Subsequent Event [Line Items]
Minimum obligation to be repaid | $			$ 25,000,000.0
Forecast [Member] | Omnibus Amendment [Member] | EVO Equipment Leasing, LLC [Member] | CNG Tractors [Member]
Subsequent Event [Line Items]
Number of tractors to be acquired | Tractor			89
Paycheck Protection Program Loan [Member] | Forecast [Member] | Omnibus Amendment [Member] | Maximum [Member]
Subsequent Event [Line Items]
Principal amount | $	$ 10,000,000