CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities:
Net income (loss)	$ 7,790	$ (3,482)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	18,733	20,045
Bad debt expense	(102)	478
Deferred income tax (benefit) expense, net	(1,979)	807
Share-based compensation	745	834
(Gain) loss on disposal of assets, net	(317)	22
Asset impairments		588
Other	71	40
Changes in operating assets and liabilities:
Accounts and other receivables	(18,174)	(5,797)
Inventories and prepaid expenses	1,852	1,172
Accounts payable and accrued expenses	6,213	1,594
Insurance and claims accruals	357	(2,745)
Other long-term assets and liabilities	503	850
Net cash provided by operating activities	15,692	14,406
Investing activities:
Capital expenditures	(1,066)	(9,809)
Proceeds from sale of property and equipment	6,141	1,459
Net cash provided by (used in) investing activities	5,075	(8,350)
Financing activities:
Borrowings under long-term debt	28,760	33,200
Payments on long-term debt	(39,156)	(27,492)
Principal payments on financing lease obligations	(5,888)	(11,366)
Net change in bank drafts payable	(2,785)	(346)
Net payments for tax withholdings for vested stock-based awards	(9)	(57)
Net cash used in financing activities	(19,078)	(6,061)
Increase (decrease) in cash and restricted cash	1,689	(5)
Cash and restricted cash:
Beginning of period	325	97
End of period	2,014	92
Supplemental disclosure of cash flow information:
Interest	2,106	2,704
Income taxes, net of refunds	6,623	29
Supplemental disclosure of non-cash investing:
Sales of revenue equipment included in other receivables		$ 730
Purchase of revenue equipment included in accounts payable	$ 1,021