Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 21,314	$ 42,205
Restricted cash	8,500	8,500
Trade accounts receivable, net	1,624	6,078
Inventory	13,102	11,444
Prepaid expenses and other current assets	3,460	2,048
Other current assets	547	507
Current assets of discontinued operations	6,636	7,196
Total current assets	55,183	77,978
Property and equipment, net	10,276	10,618
Intangible assets	102,500	102,500
Goodwill	6,234	6,234
Other assets	2,646	2,832
Noncurrent assets of discontinued operations	3,405	2,673
Total assets	180,244	202,835
Current liabilities:
Accounts payable	5,191	4,742
Accrued expenses	6,567	6,016
Accrued compensation	1,657	3,157
Common stock warrant liabilities	4,683	5,093
Revolving credit facility	2,565	1,450
Long-term debt, current portion	1,881	0
Deferred revenue	1,031	1,472
Current liabilities of discontinued operations	21,397	22,307
Total current liabilities	44,972	44,237
Note payable	2,549	2,461
Long term debt	17,447	19,242
Deferred revenue, less current portion	7,345	7,063
Deferred income taxes	52,000	53,000
Deferred income taxes	20,500	20,500
Other long-term liabilities	1,138	1,053
Stockholders' equity:
Common stock	153	153
Additional paid-in capital	458,661	456,786
Accumulated deficit	(424,521)	(401,660)
Total stockholders’ equity	34,293	55,279
Total liabilities and stockholders’ equity	$ 180,244	$ 202,835