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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Cash flows from operating activities: |  |
Net loss | $ (7,882) | $ (6,690)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation expense | 1,415 | 1,339
Depreciation and amortization | 83 | 64
Loss on disposal of property and equipment |  | 1
Changes in operating assets and liabilities: |  |
Accounts receivable | 236 | 1,431
Projects in process | (44) | (624)
Prepaid expenses and other assets | (61) | 259
Accounts payable and accrued expenses | 429 | 20
Deferred revenue | (186) | 88
Net cash used in operating activities | (6,010) | (4,112)
Cash flows from investing activities: |  |
Purchase of property and equipment | (86) | (34)
Net cash used in investing activities | (86) | (34)
Cash flows from financing activities: |  |
Proceeds from sales of common stock, net of offering costs | 9,254 |
Proceeds from exercise of stock options |  | 166
Proceeds from exercise of stock warrants | 36 | 200
Net cash provided by financing activities | 9,290 | 366
Effect of exchange rate changes on cash | 39 | 37
Net increase (decrease) in cash | 3,233 | (3,743)
Cash at beginning of period | 8,815 | 9,097
Cash at end of period | 12,048 | 5,354
Supplemental disclosure of cash flow information: |  |
Cash paid for income taxes | 1 | 30
Supplemental disclosure on non-cash investing and financing activities: |  |
Purchase of equipment with capital lease obligation | $ 530 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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