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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Operating Activities:    
Net loss $ (29,125,446) $ (19,189,864)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 2,852,049 2,975,428
Share based compensation 457,500 425,323
Amortization of financing costs to interest expense 243,882 0
Non-cash interest expense 1,065,780 0
Amortization of debt discount 13,497,788 0
Non-cash Preferred C Penalty Shares 0 300,000
Loss on extinguishment of liabilities 3,146,474 983,013
Accrued litigation settlement (241,195) 287,358
Deemed interest expense on warrant liability 909,092 0
Change in fair value of derivative liabilities (3,952,174) 2,188,115
Bad debt expense 82,553 0
Changes in operating assets and liabilities:    
Accounts receivable 743,259 (720,530)
Related party receivables and deposits 0 (113,078)
Inventories (2,390,242) (446,504)
Prepaid expenses and other current assets 722,155 4,031
Accounts payable 210,174 127,064
Accrued expenses (733,205) 808,618
Warranty reserve 48,000 6,063
Net cash used in operating activities (12,463,556) (12,364,963)
Investing Activities:    
Purchase of property, plant and equipment (29,194) (53,511)
Interest income on restricted cash (34,689) 0
Patent activity costs (163,325) (265,911)
Net cash used in investing activities (227,208) (319,422)
Financing Activities:    
Payment of debt financing costs (270,000) (115,000)
Repayment of debt (123,508) (139,152)
Changes in restricted cash 6,000,000 0
Proceeds from issuance of stock and warrants 4,000,000 10,946,638
Net cash provided by financing activities 9,606,492 10,692,486
Net change in cash and cash equivalents (3,084,272) (1,991,899)
Cash and cash equivalents at beginning of period 3,316,576 3,318,155
Cash and cash equivalents at end of period 232,304 1,326,256
Supplemental Cash Flow Information:    
Cash paid for interest 224,300 248,399
Non-Cash Transactions:    
Non-cash conversions of preferred stock and convertible notes to equity 7,745,950 7,902,911
Make-whole provision on convertible preferred stock $ 0 $ 8,087,500