Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 1,034	$ 701
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	497	540
Allowance for doubtful accounts	26	88
Amortization of deferred finance cost	6	25
Value of share-based payment arrangements	69	182
Deferred tax benefit	583	451
Compensation expense for stock purchases	0	13
Changes in assets and liabilities:
Trade accounts receivable	(712)	(261)
Inventories	477	(1,801)
Prepaid expenses and other current assets	(235)	426
Other assets	(19)	13
Accounts payable and accrued expenses	(1,113)	2,751
Cash provided by operating activities	613	3,128
Cash flows from investing activities:
Additions to patents	(43)	(23)
Additions to property, plant, and equipment	(903)	(595)
Cash used by investing activities	(946)	(618)
Cash flows from financing activities:
Proceeds from issuance of common stock - net	3	5,125
Repurchase of warrants	(90)	0
Proceeds (repayment) of short-term debt - net	1,470	(2,909)
Proceeds from long-term debt	0	100
Repayment of long-term debt	(1,018)	(1,199)
Cash provided by financing activities	365	1,117
Increase in cash and cash equivalents	32	3,627
Cash and cash equivalents at beginning of period	3,926	299
Cash and cash equivalents at end of period	3,958	3,926
Supplemental disclosure of cash flow information:
Cash paid during period for interest	862	915
Cash paid for income taxes	$ 59	$ 29