Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 17,167	$ 28,948
Short-term investments	613	1,061
Accounts receivable, net of allowance of $69 and $51 at June 30, 2011 and December 31, 2010, respectively	4,420	4,792
Inventories	9,968	5,957
Prepaid and other current assets	864	997
Total current assets	33,032	41,755
Non-current assets:
Property and equipment, net	2,141	2,390
Goodwill	1,316	1,316
Intangible assets, net	1,849	1,950
Restricted cash	312	305
Other assets	450	451
Total assets	39,100	48,167
Liabilities and stockholders' equity
Accounts payable	4,682	3,230
Accrued liabilities	5,334	6,003
Deferred revenue	123	248
Current portion of long-term debt	1,876	1,747
Current portion of capital lease obligations	11	10
Warrant liability	10,082	8,465
Total current liabilities	22,108	19,703
Non-current liabilities:
Long-term debt	2,159	3,131
Long-term portion of capital lease obligations	0	6
Other non-current liabilities	1,588	1,595
Total liabilities	25,855	24,435
Commitments and contingencies
Stockholders' equity:
Preferred stock	9,496	9,496
Common stock	48	47
Additional paid-in capital	441,976	441,034
Accumulated other comprehensive income	1	108
Accumulated deficit	(438,276)	(426,953)
Total stockholders' equity	13,245	23,732
Total liabilities and stockholders' equity	$ 39,100	$ 48,167