Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (460)	$ (15,169)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation	3,235	3,235
Amortization of intangible assets	2,147	2,216
Gain on insurance proceeds	1,000
Write-off of intangible assets		507
Amortization of lease right of use asset, net	14	49
Non-cash adjustment of cylinder deposits		(502)
Lower of cost or net realizable value reserve	(3,622)	488
Allowance for doubtful accounts	724	(407)
Stock compensation expense	559	900
Amortization of deferred finance costs	843	932
Deferred tax expense	104	691
Changes in assets and liabilities:
Trade accounts receivable	(7,366)	(5,293)
Inventories	22,486	42,131
Prepaid and other assets	873	133
Income tax receivable	(351)
Accounts payable and accrued expenses	1,664	(619)
Cash provided by operating activities	19,850	29,292
Cash flows from investing activities:
Additions to property, plant, and equipment	(996)	(930)
Proceeds from Insurance Policy	1,000
Cash provided by (used in) investing activities	4	(930)
Cash flows from financing activities:
Proceeds from issuance of common stock		9
Borrowing - Paycheck Protection Program	2,475
Repayment of short-term debt	(14,000)	(13,817)
Repayment of long-term debt	(1,694)	(2,140)
Cash used in financing activities	(13,219)	(15,948)
Increase in cash and cash equivalents	6,635	12,414
Cash and cash equivalents at beginning of period	2,600	2,272
Cash and cash equivalents at end of period	9,235	14,686
Supplemental Disclosure of Cash Flow Information:
Cash paid during period for interest	8,745	11,607
Refund received for income taxes - net	$ (41)	$ (124)