Acquisitions - Additional Information (Details) - USD ($)										1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 07, 2020	Jan. 13, 2020	Nov. 18, 2019	Nov. 07, 2019	Sep. 16, 2019	Jul. 19, 2019	Feb. 01, 2019	Jan. 04, 2019	Jan. 02, 2019	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Common stock, par value											$ 0.0001	$ 0.0001
Goodwill											$ 23,837,000	$ 23,837,000		$ 2,887,000
Payment of cash													$ 19,482,000
Truckserv Maintenance Operations [Member]
Business Acquisition [Line Items]
Purchase price payable		$ 450,000
Truckserv Maintenance Operations [Member] | JB Lease Note [Member]
Business Acquisition [Line Items]
Debt instrument, monthly payment of principle and interest		$ 10,000
Purchase price payable period		15 months
quarterly principal payments		$ 300,000
Common Stock [Member]
Business Acquisition [Line Items]
Debt repayment in the form shares											8,664
JB Lease [Member]
Business Acquisition [Line Items]
Payment of cash							$ 2,500,000
Business acquisition debt assumed							11,200,000
JB Lease [Member] | Promissory Note [Member]
Business Acquisition [Line Items]
Principal amount							$ 6,400,000
Interest rate							9.00%
Debt instrument maturity, description												maturity date of August 2020
Debt instrument, description												The JB Lease Note is interest-free until June 1, 2019, and is secured by 100% of the equity in Ursa and JB Lease. Beginning June 1, 2019, the JB Lease Note provides for monthly principal and interest payments of $50,000 and bears interest at a rate of 9% per annum, which interest is payable monthly in advance beginning June 1, 2019.
Interest payments							$ 50,000
Intercompany Agreement [Member] | Sheehy Enterprises, Inc. [Member]
Business Acquisition [Line Items]
Accrued interest - related party				$ 40,000
Intercompany Agreement [Member] | Sheehy Enterprises, Inc. [Member] | Promissory Note [Member]
Business Acquisition [Line Items]
Outstanding balance			$ 400,000
Accrued interest - related party			$ 40,000
Intercompany Agreement [Member] | Sheehy Enterprises, Inc. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Debt repayment in the form shares			35,156	35,156
Sheehy [Member]
Business Acquisition [Line Items]
Business combination, common stock issued								2,240,000
Description of acquisition agreement												Under the Sheehy acquisition agreement, at any time from April 1, 2020, until October 31, 2020, the Sheehy stockholders may request the Company to net settle in cash any number of the 2,240,000 common shares from the acquisition with a fair market value of up to $1.2 million as of the date of the redemption request.
Shares issued upon conversion	$ 1,200,000
Goodwill								$ 4,051,000
Business acquisition debt assumed								$ 2,639,000
Sheehy [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, common stock issued								2,240,000
Sheehy [Member] | Sheehy Enterprises, Inc. [Member]
Business Acquisition [Line Items]
Lease agreement monthly payment									$ 92,000
Lease agreement payment period									44 months
Debt instrument maturity, description												maturity date of March 3, 2019
Increased principal amount if not repaid on maturity date									$ 450,000			$ 450,000
Common stock, par value									$ 2.50
Sheehy [Member] | Sheehy Enterprises, Inc. [Member] | Promissory Note [Member]
Business Acquisition [Line Items]
Principal amount									$ 400,000			$ 400,000
Interest rate									5.65%
Sheehy [Member] | Put Option [Member] | Maximum [Member]
Business Acquisition [Line Items]
Exchange of common stock fair value								$ 1,200,000
Sheehy [Member] | Put Option [Member] | Maximum [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Exchange of common stock fair value								$ 1,200,000
Ursa [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, common stock issued							800,000
Ursa and JB Lease [Member]
Business Acquisition [Line Items]
Business combination, common stock issued							800,000
Goodwill							$ 6,881,000
Business acquisition debt assumed							11,199,000
Business combination, cash paid at closing							$ 2,500,000
Finkle and Courtlandt [Member]
Business Acquisition [Line Items]
Business combination, common stock issued						1,250,000
Goodwill						$ 2,384,000
Business acquisition debt assumed						$ 5,049,000
Business acquisition, effective date						Jul. 15, 2019
Business combination, cash paid at closing						$ 1,250,000
Business combination, estimated contingent liability related to earnout						$ 0					$ 0
Finkle and Courtlandt [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, common stock issued						1,250,000
Finkle and Courtlandt [Member] | Maximum [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, earnout of additional common shares issued						1,000,000
Ritter Companies [Member]
Business Acquisition [Line Items]
Business combination, common stock issued					2,440,982
Goodwill					$ 8,704,000
Business acquisition debt assumed					$ 499,000
Business acquisition, effective date					Sep. 16, 2019
Business combination, cash paid at closing					$ 20,611,000
Ritter Companies [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, common stock issued					2,440,982
Finkle Transport Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, transaction costs										$ 300,000
Finkle Transport Inc. [Member] | Common Stock [Member] | Contingent Consideration [Member]
Business Acquisition [Line Items]
Business combination, common stock issued										870,317