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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Cash flows from operating activities: |  |
Net loss | $ (6,690) | $ (5,015)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation expense | 1,339 | 2,351
Depreciation and amortization | 64 | 40
Loss on disposal of property and equipment | 1 |
Changes in operating assets and liabilities: |  |
Accounts receivable | 1,431 | 1,623
Other assets | (1) |
Prepaid expenses | (364) | (96)
Accounts payable and accrued expenses | 20 | 87
Deferred revenue | 88 | (363)
Net cash used in operating activities | (4,112) | (1,373)
Cash flows from investing activities: |  |
Purchase of property and equipment | (34) | (268)
Net cash used in investing activities | (34) | (268)
Cash flows from financing activities: |  |
Proceeds from exercise of stock options | 166 |
Proceeds from exercise of warrants | 200 | 8
Net cash provided by financing activities | 366 | 8
Effect of exchange rate changes on cash | 37 | (32)
Net decrease in cash | (3,743) | (1,665)
Cash at beginning of period | 9,097 | 12,940
Cash at end of period | 5,354 | 11,275
Supplemental disclosure of cash flow information: |  |
Interest Paid |  |
Income taxes paid | $ 30 | $ 42

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