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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Cash Flows From Operating Activities: |  |
Net loss | $ (12,318) | $ (17,068)
Adjustments to reconcile net loss to net cash used in operating activites: |  |
Stock-based compensation | 1,669 | 1,851
Stock issued for exclusive channel collaboration agreement | 0 | 7,815
Stock issued for acquisition of program assets | 0 | 1,169
Stock issued for license agreement | 425 | 0
Depreciation | 43 | 63
Provision for uncollectible accounts receivable | 0 | 442
Write-off of uncollectible note and interest receivable | 763 | 0
Loss on sale of equipment | 58 | 0
Impairment loss on equipment | 121 | 47
Gain on sale of discontinued operations | 0 | (677)
Changes in operating assets and liabilities: |  |
Accounts receivable | 0 | 14
Prepaid expenses and other current assets | 855 | (2,544)
Deposits and other assets | 33 | (6)
Accounts payable | (253) | 7
Accrued liabilities | 885 | (29)
Net Cash Used In Operating Activities | (7,719) | (8,916)
Cash Flows From Investing Activities: |  |
Purchase of property and equipment | (36) | (10)
Net Cash Used In Investing Activities | (36) | (10)
Cash Flows From Financing Activities: |  |
Proceeds from issuance of common stock for stock option and warrants exercises | 232 | 2,082
Proceeds from issuance of common stock, net issuance costs $1,031 and $680, respectively | 12,193 | 10,120
Cash received from issuance of stock to non-controlling interest | 1 | 0
Net Cash Provided By Financing Activities | 12,426 | 12,202
Net increase in cash and cash equivalents | 4,671 | 3,276
Cash and cash equivalents at beginning of period | 9,954 | 6,678
Cash and cash equivalents at end of period | 14,625 | 9,954
Supplemental disclosures of cash flow information: |  |
Cash paid for interest | 0 | 0
Cash paid for taxes | $ 0 | $ 0

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