Subsequent Events - Agreement With Triumph Business Capital - Additional Information (Details) $ in Thousands		1 Months Ended		6 Months Ended
	Mar. 09, 2021 USD ($) Installment	Feb. 28, 2021 USD ($)	Jan. 31, 2021 USD ($)	Jun. 30, 2019 USD ($)
Subsequent Event [Line Items]
Repayment of factor advances				$ 317
Triumph Business Capital [Member] | Letter of Intent and Memo of Understanding [Member] | Forecast [Member]
Subsequent Event [Line Items]
Proceeds from transportation settlements	$ 1,600	$ 17,500	$ 7,100
Transportation settlements fund held in reserve	600
Line of credit facility advance	3,000
Repayment of factor advances	11,000
Amount retained to reduce outstanding principal amount of factoring advances	$ 6,900
Number of installments for repayment | Installment	48
Frequency of payments	monthly
Date of first required payment	Jan. 01, 2022
Funds held in reserve against advances	$ 800