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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