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Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Operating Activities: |  |
Net loss | $ (1,412) | $ (1,828)
Adjustments to reconcile net loss to net cash used in operating activities |  |
Depreciation and amortization | 61 | 80
Stock-based compensation expense | 159 | 161
Issuance of common stock for services | 10 | 114
Issuance of warrants for services |  | 71
Amortization of warrants issued for debt issuance costs |  | 3
Provision for doubtful accounts | 15 | (1)
Change in operating assets and liabilities: |  |
Accounts receivable | 451 | 225
Inventories | 51 | 46
Prepaid expenses and other current assets | (37) | 31
Accounts payable | (15) | (249)
Deferred revenue | 72 | (76)
Accrued liabilities | 82 | 170
Net cash used in operating activities | (563) | (1,253)
Investing activities |  |
Purchases of property and equipment | (20) | (10)
Net cash used in investing activities | (20) | (10)
Financing activities |  |
Payments on capital lease obligations |  | (11)
Proceeds from the issuance of common stock | 1,377 |
Proceeds from the sale of common stock under associate stock purchase plan | 14 | 32
Net cash provided by financing activities | 1,391 | 21
Effect of Exchange Rate Changes on Cash |  | (4)
Increase (Decrease) in Cash and Cash Equivalents | 808 | (1,246)
Cash and Cash Equivalents, beginning of period | 2,252 | 5,478
Cash and Cash Equivalents, end of period | $ 3,060 | $ 4,232

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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26, 31 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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- Definition Cash received on stock transaction after deduction of issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section H + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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