Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net loss	$ (5,709)	$ (6,055)	$ (8,517)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Loss on impairment	672		156
Depreciation	637	589	790
Stock-based compensation	200	426	878
Valuation of equity instruments		56	1,812
Provision for doubtful accounts receivable	147	115	44
Amortization of intangible assets	419	649	1,073
Amortization of discounts on long-term borrowings	236	574	349
Amortization of loan origination fees	113
Deferred revenue	(311)	16	1,215
Change in estimate of contingent liabilities	(102)	(411)
(Gain) loss on disposal of property and equipment	(3)	(11)	(22)
Changes in assets and liabilities:
Accounts receivable, inventories, and other assets	(3,158)	3,411	(1,694)
Accounts payable and accrued liabilities	(107)	(1,976)	5,409
Total adjustments	(1,257)	3,438	10,010
Net cash (used in) provided by operating activities	(6,966)	(2,617)	1,493
Cash flows from investing activities:
Proceeds from the sale of property and equipment	3	19	50
Acquisition of property and equipment	(332)	(256)	(332)
Net cash used in investing activities	(329)	(237)	(282)
Cash flows from financing activities:
Proceeds from issuances of common stock, net	4,826	456	669
Proceeds from exercise of stock options		5	8
Proceeds from other borrowings	1,500	605	1,150
Payments on other borrowings	(886)	(892)
Net proceeds on credit line borrowings	889	701
Net cash provided by financing activities	6,329	875	1,827
Effect of exchange rate changes on cash	11	8	7
Net (decrease) increase in cash and cash equivalents	(955)	(1,971)	3,045
Cash and cash equivalents at beginning of year	2,136	4,107	1,062
Cash and cash equivalents at end of period	1,181	2,136	4,107
Classification of cash and cash equivalents:
Cash and cash equivalents	929	2,117	3,979
Restricted cash held	252	19	128
Interest paid	186	328	171
Non-cash investing and financing activities:
Fully depreciated assets disposed of	$ 2	$ 1,050	$ 1,548