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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Cash Flows From Operating Activities: |  |
Net loss | $ (8,093) | $ (5,002)
Adjustments to reconcile net loss to net cash used in operating activites: |  |
Stock-based compensation | 1,202 | 1,303
Depreciation | 33 | 51
Provision for uncollectible accounts receivable | 0 | 269
Provision for uncollectible note and interest receivables | 763 | 0
Loss on sale of equipment | 58 | 0
Impairment on loss of equipment | 0 | 30
Gain on sale of discontinued operations | 0 | (677)
Changes in operating assets and liabilities: |  |
Accounts receivable | 0 | 14
Prepaid expenses and other current assets | 800 | (135)
Deposits and other assets | 33 | 4
Accounts payable | 189 | 2
Accrued liabilities | 0 | (2)
Net Cash Used In Operating Activities | (5,015) | (4,143)
Cash Flows From Investing Activities: |  |
Purchase of property and equipment | (25) | (7)
Net Cash Used In Investing Activities | (25) | (7)
Cash Flows From Financing Activities: |  |
Proceeds from issuance of common stock for stock option exercises | 231 | 94
Proceeds from issuance of common stock for warrant exercises | 0 | 1,955
Net Cash Provided By Financing Activities | 231 | 2,049
Net decrease in cash | (4,809) | (2,101)
Cash at beginning of period | 9,954 | 6,678
Cash at end of period | 5,145 | 4,577
Supplemental disclosures of cash flow information: |  |
Cash paid for interest | 0 | 0
Cash paid for taxes | $ 0 | $ 0

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