CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash provided by (used in) operating activities
Net income (loss)	$ 172	$ (44,828)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Amortization of intangible assets	2,729	3,687
Depreciation	3,875	3,849
Change in value and exercise of warrants	1,352	19,200
Stock-based compensation expense	1,101	1,963
Amortization of financing fees	545	947
Deferred income taxes	(30)	(87)
Other non-cash adjustments, net	193	1,661
Changes in operating assets and liabilities:
Accounts receivable, net	9,213	(3,058)
Inventory, net	(9,613)	(32,657)
Prepaid expenses and other assets	6,897	(5,387)
Accounts payable	379	37,355
Accrued expenses	6,262	10,773
Other noncurrent liabilities	(3,953)	2,908
Net cash provided by (used in) operating activities	19,122	(3,674)
Cash used in investing activities
Capital expenditures	(2,048)	(2,321)
Asset acquisitions	0	(6,595)
Other investing activities, net	13	0
Net cash used in investing activities	(2,035)	(8,916)
Cash (used in) provided by financing activities
Proceeds from revolving line of credit	394,631	372,557
Repayments of revolving line of credit	(412,488)	(357,121)
Proceeds from Weichai Warrant exercise	1,616	0
Other financing activities, net	(899)	(832)
Net cash (used in) provided by financing activities	(17,140)	14,604
Net (decrease) increase in cash and restricted cash	(53)	2,014
Cash at beginning of the period	54	0
Cash at end of the period	$ 1	$ 2,014