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STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Operating activities: |  |
Net loss | $ (1,283) | $ (1,192)
Adjustment to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 610 | 735
Impairment of fixed asset | 54 |
Share-based compensation | 207 | 182
Changes in assets and liabilities related to operations: |  |
Trade accounts receivable | 73 | (119)
Inventories | (110) | 288
Prepaid expenses and other assets | (194) | 120
Accounts payable | 161 | (14)
Accrued expenses | 241 | (240)
Net cash used in operating activities | (241) | (240)
Investing activities: |  |
Acquisition of equipment and leasehold improvements | (128) | (280)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements | (37) | (8)
Net cash used in investing activities | (165) | (288)
Financing activities: |  |
Principal payment on capital leases | (96) | (85)
Proceeds from sale of common stock | 988 |
Proceeds from exercise of stock options | 18 | 26
Net cash provided by (used in) financing activities | 910 | (59)
Increase/(Decrease) in cash and cash equivalents | 504 | (587)
Cash and cash equivalents at beginning of period | 1,275 | 1,862
Cash and cash equivalents at end of period | 1,779 | 1,275
Supplemental cash flow information: |  |
Interest paid | 15 | 14
Supplemental non-cash investing activities: |  |
Accounts payable incurred for the purchase of equipment and leasehold improvements |  | 37
Capital lease obligations incurred in the purchase of equipment | $ 75 | $ 132

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