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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income (loss) $ (19,031) $ (13,023)
Adjustments to reconcile net income (loss) to net cash from (used in) operating activities:    
Depreciation and amortization of property and equipment 12,928 16,976
Loss (gain) on disposal of property and equipment   252
Loss (gain) on build-to-suit accounting derecognition (4,936)  
Loss on impairment 7,603  
Changes in reserves and allowances (493) (1,035)
Share-based compensation 4,249 4,457
Non-cash interest expense 364 250
Changes in operating assets and liabilities:    
Accounts receivable 39 111
Inventories 4,590 720
Prepaid expenses and other current assets (1,623) 2,961
Accounts payable 2,341 2,817
Accrued expenses and other current liabilities (5,370) (6,192)
Deferred revenue 846 (3,408)
Other noncurrent assets and liabilities 1,562 (2,668)
Net cash from (used in) operating activities 3,069 2,218
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property and equipment (2,840) (2,824)
Proceeds from sale of property and equipment 113 123
Net cash from (used in) investing activities (2,727) (2,701)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payments of debt issuance costs   (24)
Proceeds from exercise of stock options 483 94
Principal payments on capital lease obligations, pre adoption (117) (120)
Net cash from (used in) financing activities 366 (50)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH 708 (533)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH - Beginning of period 46,443 97,307
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH - End of period 47,151 96,774
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:    
Cash paid for income taxes, net of refunds 60 60
Cash paid for interest 3,552 4,792
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:    
Acquisition (disposal) of property and equipment financed under capital lease 565  
Non-cash additions to property and equipment 168 241
Purchases of property and equipment in Accounts payable and Accrued expenses and other current liabilities $ 279 $ 168