Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 7,672	$ 49,172
Trade accounts receivable	3,218	4,474
Inventory, net	18,556	18,293
Prepaid expenses and other current assets	2,355	2,251
Total current assets	31,801	74,190
Property and equipment, net	15,009	15,434
Other assets	4,583	4,644
Total assets	51,393	94,268
Liabilities and stockholders' equity
Accounts payable	6,167	5,580
Accrued expenses	8,830	9,439
Accrued compensation	2,769	3,604
Revolving credit facility	3,612	3,449
Long-term debt, current portion	3,504	3,519
Deferred revenue, current portion	6,980	9,973
Total current liabilities	31,862	35,564
Long-term debt, less current portion	19,547	19,934
Deferred rent	330	360
Deferred revenue, less current portion	6,251	9,376
Other long-term liabilities	545	300
Commitments and contingencies
Stockholders' equity:
Common stock	34	34
Additional paid-in capital	229,087	226,802
Accumulated deficit	(236,263)	(198,102)
Total stockholders' equity (deficit)	(7,142)	28,734
Total liabilities and stockholders' equity	$ 51,393	$ 94,268