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STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Operating activities: |  |
Net loss | $ (2,478) | $ (2,393)
Adjustments to reconcile net loss to cash used in operating activities: |  |
Depreciation and amortization | 875 | 982
Share-based compensation | 242 | 291
(Gain) Loss on disposal of equipment | (23) | 4
Allowance for excess inventory quantities | 52 |
Changes in assets and liabilities related to operations: |  |
Trade accounts receivable | 979 | (153)
Other receivables | 26 | (13)
Inventories | 111 | 200
Prepaid expenses and other assets | 39 | 151
Accounts payable | (180) | 355
Accrued expenses | (165) | (24)
Net cash used in operating activities | (522) | (600)
Investing activities: |  |
Proceeds from disposal of equipment | 23 |
Acquisition of equipment and leasehold improvements | (279) | (152)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements | (20) | (15)
Net cash used in investing activities | (276) | (167)
Financing activities: |  |
Principal payment on capital leases | (57) | (23)
Proceeds from shareholder rights offering, net of costs |  | 2,220
Proceeds from exercise of stock options | 7 | 0
Net cash (used in) provided by financing activities | (50) | 2,197
(Decrease) increase in cash and cash equivalents | (848) | 1,430
Cash and cash equivalents at beginning of period | 4,124 | 2,694
Cash and cash equivalents at end of period | 3,276 | 4,124
Supplemental cash flow information: |  |
Interest paid | 12 | 7
Supplemental non-cash investing and financing activities: |  |
Accounts payable incurred for the purchase of equipment and leasehold improvements | 23 | 20
Capital lease obligations incurred in the purchase of equipment |  | $ 120

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