Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net loss	$ (11,396)	$ (18,553)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	20,001	19,120
Asset impairment, net	396	1,574
Stock-based compensation	2,080	3,036
(Gain) loss on disposition of assets, net	(675)	1,573
Amortization of deferred rent	60	0
Deferred income taxes	(120)	110
Amortization of deferred financing costs	290	344
Bad debt expense	22	0
Changes in operating assets and liabilities
Accounts receivable	(5,694)	(4,343)
Inventories	(116)	(257)
Prepaid expenses and other assets	(1,212)	(1,037)
Accounts payable and accrued liabilities	2,535	655
Net cash provided by operating activities	6,171	2,222
Cash flows from investing activities
Purchases of property, plant and equipment	(24,804)	(26,975)
Proceeds from insurance claims	257	0
Proceeds from the sale of assets	487	1,088
Net cash used in investing activities	(24,060)	(25,887)
Cash flows from financing activities
Borrowings under Credit Facility	50,526	38,410
Repayments under Credit Facility	(31,150)	(17,162)
Purchase of treasury stock	(350)	(162)
RSUs withheld for taxes	(95)	(853)
Financing costs paid	(114)	(538)
Payments for capital lease obligations	(496)	(449)
Net cash provided by financing activities	18,321	19,246
Net increase (decrease) in cash and cash equivalents	432	(4,419)
Cash and cash equivalents
Beginning of period	2,533	7,071
End of period	2,965	2,652
Supplemental disclosure of cash flow information
Cash paid during the period for interest	2,971	1,865
Supplemental disclosure of non-cash investing and financing activities
Change in property, plant and equipment purchases in accounts payable	(264)	(3,648)
Additions to property, plant and equipment through capital leases	515	822
Additions to property, plant and equipment through tenant allowance on leasehold improvement	694	0
Additions to deferred financing costs in accounts payable	$ 423	$ 0