CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities        
Net loss $ (10,555) $ (13,964) $ (18,978) $ (27,450)
Adjustments to reconcile net loss to net cash used in operating activities        
Stock based compensation 432 492 625 796
Share-based consulting and other services 219 233 307 94
Allowance for doubtful accounts 81 24 14 16
Bad debt write-off     257 0
Inventory reserve     200 0
Gain from non-monetary exchange     (65) 0
Depreciation and amortization 2,876 2,862 3,871 2,370
Change in fair value of derivative liabilities (1,567) 0    
Impairment     0 933
Accretion of financing instruments     0 176
Inducement expense     0 391
Other expense     0 10,068
Other income     (440) 0
Non-cash interest expense     0 601
Amortization of offering costs 163 0    
Non-monetary transaction 43 (65)    
Payment made in stock (payroll and consultants) 1,323 0    
Reversal of accrued bonus expense     (25) (2,335)
Inventory write-off     159 0
Changes in assets and liabilities        
Accounts receivable (532) (185) (185) (804)
Inventory 529 (1,369) (1,676) (2,621)
Prepaid expenses and other current assets 132 (22) (3) 293
Accounts payable 486 (1,153) (973) 1,186
Accrued expenses 94 248 359 21
Accrued interest and fees     0 1,300
Deferred revenue - related party (252) 0 0 480
Due to related parties 1,384 805 1,934 91
Net cash used in operating activities (5,144) (12,094) (14,619) (14,395)
Cash flows from investing activities        
Capital expenditures for property and equipment (160) (114) (134) (294)
Capitalization of intangible assets (1,716) (1,105) (1,771) (2,602)
Net cash used in investing activities (1,876) (1,219) (1,905) (2,896)
Cash flows from financing activities        
Repayment of capital lease obligations (29) (92) (123) (123)
Proceeds from issuance of convertible preferred stock, common stock and warrants, net of offering costs 1,977 0 664 0
Proceeds from issuance of convertible notes payable 1,470 0 0 450
Principle repayments on convertible notes payable (702)      
Proceeds from issuance of common stock and warrants, net of offering costs 4,670 9,777    
Proceeds from issuance of common stock 17 0 11,224 17,340
Proceeds from convertible bridge loan payable ($2,727 to related party)     0 4,994
Repayment of convertible bridge loan payable     0 (125)
Proceeds from issuance of warrants     0 1
Net cash provided by financing activities 7,403 9,685 11,765 22,537
Net increase (decrease) in cash 383 (3,628) (4,759) 5,246
Cash, beginning of period 758 5,517 5,517 271
Cash, end of period 1,141 1,889 758 5,517
Cash paid for interest 240 0    
Cash paid for taxes 0 0    
Supplemental cash flow disclosures of investing and financing activities        
Issuance of Common stock in connection with conversion of amounts due to related party 1,756 0    
Common stock issued in connection with conversion of preferred stock and deemed dividend 5,677 0 17  
Conversion of amounts of due to related parties into Series B Preferred, common stock and warrants 1,003 0    
Reclassification of derivative liabilities to stockholders’ equity upon the exercise of warrants 1,197   270 0
Amortization of commitment fees 135 45 294 0
Issuance of common stock in connection with the payment of a bonus 0 195 272 0
Issuance of common stock in connection with the repayment of accrued interest $ 90 $ 90    
Stock issued as payment for interest on convertible note     180 180
Reclassification of inventory to fixed asset     163 0
Reclassification of fixed asset to inventory     0 293
Stock issued as payment of fees on convertible preferred stock     17 0
Conversion of note payable       15,000
Conversion of convertible bridge loan payable including interest and fees     0 9,023
Interest and fees refinanced under the bridge loan     0 5,408
Due to related party refinanced under the bridge loan     0 1,393
Related party amount refinanced under the bridge loan     0 1,013
Capital lease obligation for property and equipment     $ 0 $ 370