Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (17,836)	$ (33,672)
Adjustments to reconcile net loss to cash (used in) provided by operating activities:
Depreciation	2,154	2,080
Amortization of intangible assets	1,474	1,483
Amortization of step-up in inventory basis	0	2,520
Amortization of lease right of use asset, net	39	0
Noncash adjustment of cylinder deposits	(502)	0
Lower of cost or net realizable value reserve	1,991	30,906
Allowance for doubtful accounts	(507)	35
Value of share-based payment arrangements	628	214
Amortization of deferred finance costs	618	485
Deferred tax (benefit) expense	143	(10,729)
Changes in assets and liabilities:
Trade accounts receivable	(13,478)	(23,142)
Inventories	24,724	24,272
Prepaid and other assets	(1,749)	3,583
Income taxes receivable	0	5,827
Accounts payable and accrued expenses	(789)	4,867
Cash (used in) provided by operating activities	(3,090)	8,729
Cash flows from investing activities:
Additions to property, plant, and equipment	(279)	(782)
Cash used in investing activities	(279)	(782)
Cash flows from financing activities:
Proceeds from issuance of common stock	9	17
Borrowing (repayment) of short-term debt - net	4,000	(10,070)
Repayment of long-term debt	(1,610)	(562)
Cash provided by (used in) financing activities	2,399	(10,615)
Decrease in cash and cash equivalents	(970)	(2,668)
Cash and cash equivalents at beginning of period	2,272	5,002
Cash and cash equivalents at end of period	1,302	2,334
Supplemental Disclosure of Cash Flow Information:
Cash paid during period for interest	7,894	6,107
Cash (refund) paid for income taxes - net	$ 8	$ (6,321)