Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts receivable, allowance for uncollectibles	$ 404	$ 402
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	10,000,000us-gaap_CommonStockSharesAuthorized	10,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued shares	6,877,000us-gaap_CommonStockSharesIssued	6,826,000us-gaap_CommonStockSharesIssued
Treasury stock, common shares	902,000us-gaap_TreasuryStockShares	885,000us-gaap_TreasuryStockShares
Preferred Stock $100 Par Value [Member]
Preferred shares, par value	$ 100	$ 100
Preferred shares, authorized shares	5,000	5,000
Preferred shares, issued shares	5,000	5,000
Preferred Stock $0.01 Par Value [Member]
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized shares	10,000,000	10,000,000
Preferred shares, unissued shares	10,000,000	10,000,000

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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