Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net income (loss)	$ 8,636	$ (222)	$ (6,006)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Impairment charge	60		2,384
Depreciation and amortization	2,178	2,772	3,018
Amortization of unearned stock compensation	1,298	1,176	856
Provision for doubtful accounts	73	68	285
Provision for inventory obsolescence	615	34	93
Deferred income taxes	(1,344)	1,314	6
Other non-cash items	62	222	(116)
Changes in operating assets and liabilities:
Accounts receivable	(2,507)	(12,719)	4,019
Inventories	(6,825)	(7,942)	10,483
Income taxes	14	1,499	(1,016)
Prepaid expenses	1,201	(1,368)	124
Book overdraft	(3,028)	(153)	(517)
Trade accounts payable	2,804	38	896
Accrued and other current liabilities	2,460	3,571	2,587
Other operating activities	(359)	368	147
Net cash provided by (used in) operating activities	5,338	(11,342)	17,243
Investing activities
Expenditures for property and equipment	(1,503)	(1,769)	(1,319)
Proceeds from disposals of property and equipment	20	8	5
Cash refunded (paid) for acquisition		193	(32,370)
Net cash used in investing activities	(1,483)	(1,568)	(33,684)
Financing activities
Borrowings on revolver	367,513	333,301	302,898
Payments on revolver	(369,752)	(320,133)	(281,698)
Proceeds from exercise of stock options
Payment of dividends	(48)	(81)	(2,495)
Purchase of treasury stock	(175)	(177)	(2,264)
Net cash (used in) provided by financing activities	(2,462)	12,910	16,441
Net change in cash	1,393
Cash at beginning of year
Cash at end of year	1,393
Supplemental disclosures
Cash paid during the year for interest	2,811	1,961	728
Cash paid during the year for income taxes	$ 3,696	$ 64	$ 233