CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS PROVIDED BY OPERATING ACTIVITIES:
Net income	$ 4,452	$ 3,017	$ 1,299
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,172	5,815	5,437
Provision for losses on accounts receivable	3,916	2,050	640
Loss on sale of equipment	19	12	14
Deferred and stock-based compensation	1,495	1,135	1,172
Deferred income taxes	2,043	1,666	748
Changes in operating assets and liabilities:
Accounts receivable	(1,550)	(5,452)	(2,731)
Inventories	(666)	(309)	307
Prepaid expenses	(172)	(103)	(76)
Other assets	(138)	(97)	(466)
Accounts payable and accrued expenses	(1,352)	2,615	(833)
Other	145	(243)	329
Net cash provided by operating activities	14,364	10,106	5,840
CASH FLOWS USED IN INVESTING ACTIVITIES:
Purchase of building, equipment and improvements	(5,938)	(5,138)	(4,930)
Net cash used in investing activities	(5,938)	(5,138)	(4,930)
CASH FLOWS USED IN FINANCING ACTIVITIES:
Principal payments on long-term debt	0	(302)	(677)
Payments on line of credit	(29,237)	(4,275)	0
Proceeds from line of credit	26,512	7,000	0
Purchase of common stock for incentive plans	(1,705)	(774)	(410)
Net proceeds from the exercise of stock options	139	1,069	345
Payment of taxes from traded shares	(151)	0	(72)
Payment of cash dividend	0	(10,566)	0
Net cash used in financing activities	(4,442)	(7,848)	(814)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	3,984	(2,880)	96
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,285	4,165	4,069
CASH AND CASH EQUIVALENTS AT END OF YEAR	5,269	1,285	4,165
Cash paid during the year for:
Interest	49	2	19
Income taxes	146	73	49
Supplemental noncash activities:
Asset additions and related obligations in payables	$ 646	$ 508	$ 1,239