Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net income	$ 2,186us-gaap_NetIncomeLoss	$ 3,745us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	712us-gaap_DepreciationAndAmortization	741us-gaap_DepreciationAndAmortization
Amortization of unearned stock compensation	217us-gaap_ShareBasedCompensation	213us-gaap_ShareBasedCompensation
Provision for inventory obsolescence	356us-gaap_InventoryWriteDown	412us-gaap_InventoryWriteDown
Deferred income taxes	(419)us-gaap_DeferredIncomeTaxExpenseBenefit	(243)us-gaap_DeferredIncomeTaxExpenseBenefit
Other non-cash items	44us-gaap_OtherNoncashIncomeExpense	17us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:
Accounts receivable	6,402	(6,632)
Inventories	6,972us-gaap_IncreaseDecreaseInInventories	3,763us-gaap_IncreaseDecreaseInInventories
Book overdraft	(1,634)	(1,646)
Trade accounts payable	(473)	(111)
Accrued and other current liabilities	(5,331)	(9,264)
Income taxes payable	1,697us-gaap_IncreaseDecreaseInIncomeTaxes	2,522us-gaap_IncreaseDecreaseInIncomeTaxes
Other operating activities	(440)	(529)
Net cash provided by (used in) operating activities	10,289	(7,012)
Investing activities
Expenditures for property and equipment	(440)	(655)
Net cash used in investing activities	(440)	(655)
Financing activities
Borrowings on revolver	76,746us-gaap_ProceedsFromLinesOfCredit	99,007us-gaap_ProceedsFromLinesOfCredit
Payments on revolver	(82,874)us-gaap_RepaymentsOfLinesOfCredit	(88,789)us-gaap_RepaymentsOfLinesOfCredit
Payment of dividends	(2,070)us-gaap_PaymentsOfDividends	(1,959)us-gaap_PaymentsOfDividends
Purchase of treasury stock	(1,651)	(626)
Other financing activities	0	34
Net cash (used in) provided by financing activities	(9,849)	7,667
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	$ 0	$ 0

Name:	us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.