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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash flows from operating activities |  |  |
Net loss | $ (3,950) | $ (5,370) | $ (17,282)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 734 | 812 | 876
Provision for inventory obsolescence | 178 | 157 | 733
Gain on disposal of property and equipment, net | 21 | 21 | 14
Stock based compensation | 809 | 575 | 388
Change in fair value of derivative liabilities | (64) | (1,799) | 7,285
Provision for allowance for doubtful accounts | 74 | (59) | (93)
Provision (benefit) for deferred taxes | 25 | (25) | 3,975
Changes in current assets and liabilities: |  |  |
Trade receivables | (1,884) | (874) | 90
Prepaid expenses | 103 | 286 | (259)
Inventories | (379) | (102) | 1,955
Deposits and other assets | 341 | 228 | 952
Accounts payable | 392 | (189) | 494
Accrued and other liabilities | 763 | 553 | 455
Net cash used in operating activities | (2,837) | (5,786) | (417)
Cash flows from investing activities |  |  |
Purchases of property and equipment | (286) | (421) | (630)
Acquisition of Bovie Bulgaria, net of cash acquired | 0 | (500) | 0
Net cash used in investing activities | (286) | (921) | (630)
Cash flows from financing activities |  |  |
Proceeds from stock options/warrants exercised | 124 | 1,427 | 259
Change in restricted cash | 60 | 60 | (899)
Proceeds from (repayment of) mortgage note payable | (240) | (239) | 3,173
Proceeds from issuance of common shares, net | 5,830 | 11,531 | 0
Repayment of industrial revenue bonds | 0 | 0 | (3,257)
Repurchase of warrants | 0 | 0 | (420)
Net cash provided by (used in) financing activities | 5,774 | 12,779 | (1,144)
Net change in cash and cash equivalents | 2,651 | 6,072 | (2,191)
Cash and cash equivalents, beginning of period | 11,805 | 5,733 | 7,924
Cash and cash equivalents, end of period | 14,456 | 11,805 | 5,733
Cash paid for: |  |  |
Interest paid, net | 158 | 158 | 151
Non cash investing activities: |  |  |
Note payable for acquisitions | $ 0 | $ 140 | $ 0

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow (outflow) from long-term debt, including capital lease obligations and mandatory redeemable capital securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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