Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statement of Cash Flows

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Condensed Consolidated Statement of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Operating activities:    
Net loss $ (9,760) $ (25,638)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization $ 419 333
Inventory allowance expense   21
Amortization of deferred rent $ (19) (18)
Amortization of debt discounts   198
Stock-based compensation expense $ 791 693
Loss on increase in fair value of warrant liability   16,979
Changes in operating assets and liabilities:    
Accounts receivable $ (845) (944)
Inventories (478) (573)
Prepaid expense and other assets (85) (47)
Deferred cost of revenue (823) (917)
Accounts payable 1,523 (272)
Accrued liabilities (402) (166)
Deferred revenues 1,217 1,746
Net cash used in operating activities (8,462) (8,605)
Investing activities:    
Acquisition of property and equipment, net (559) (675)
Net cash used in investing activities (559) (675)
Financing activities:    
Principal payments on notes payable (22) (2,544)
Proceeds from exercise of stock options 56 $ 23
Proceeds from exercise of common stock warrants $ 48  
Proceeds from issuance of common stock, net of issuance costs   $ 21,961
Net cash provided by financing activities $ 82 19,440
Net increase (decrease) in cash (8,939) 10,160
Cash at beginning of the period 25,190 805
Cash at end of the period $ 16,251 $ 10,965