Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements of Cash Flows [Abstract]
Net income (loss)	$ (593)	$ 241
Depreciation	160	168
Amortization of finite-lived intangible assets	21	36
Stock-based compensation	89	34
Deferred income taxes	(266)	93
Decrease in accounts receivable	502	981
Increase in inventories	(164)	(338)
(Increase) Decrease in trade accounts payable, accrued liabilities and other liabilities	382	(54)
Increase in other current assets		(18)
Net cash provided by operating activities	131	1,143
Capital expenditures	(294)	(569)
Net cash used in investing activities	(294)	(569)
Net repayments on note payable to bank	(70)
Proceeds from issuance of common stock		6,562
Payment of expenses related to the public offering		(158)
Principal payments on long-term debt	(84)	(73)
Net cash provided by (used in) financing activities	(154)	6,331
Increase (decrease) in cash and cash equivalents	(317)	6,905
Cash and cash equivalents at end of period	13,709	4,147
Cash and cash equivalents at end of period	13,392	11,052
Cash paid for income taxes	5	35
Cash paid for interest	$ 32	$ 9