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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Cash flows from operating activities:    
Net income (loss) $ (4,754) $ 4,613
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 5,386 5,387
(Gain) loss on sale or disposal of Property, equipment and leasehold improvements 22 (494)
Deferred income taxes (1,536) (629)
Stock-based compensation 1,253 687
Lease expense 101  
Other 152 188
Changes in operating assets and liabilities:    
Accounts receivable, net 75 (9,215)
Inventories (3,349) (285)
Other current assets (687) 1,761
Accounts payable, deferred revenue and other accrued expenses 8,068 7,889
Accrued salaries, wages and payroll taxes (715) (1,204)
Refundable deposits 104 (241)
Net cash provided by operating activities 4,120 8,457
Cash flows from investing activities:    
Expenditures for Property, equipment and leasehold improvements (9,440) (4,284)
Proceeds from sale of Property, equipment and leasehold improvements 22 22,936
Restricted cash from sale of Property, equipment and leasehold improvements 0 515
Net cash provided by (used in) investing activities (9,692) 19,167
Cash flows from financing activities:    
Proceeds from issuance of long-term debt 5,192 0
Principal payments on debt and finance lease obligations (455) (348)
Net borrowings (repayments) under revolving line of credit 930 (22,199)
Proceeds from issuances of common stock 0 206
Tax payments related to stock-based awards (325) (84)
Net cash provided by (used in) financing activities 5,342 (22,425)
Increase (decrease) in Cash, cash equivalents and restricted cash (230) 5,199
Cash, cash equivalents and restricted cash:    
Beginning of period 1,200 579
End of period 970 5,778
Supplemental disclosure of cash flow information:    
Cash paid for interest 761 285
Cash paid for income taxes, net 569 126
Cash paid for amounts included in measurement of lease liabilities 1,513  
Supplemental disclosure of non-cash information:    
Right-of-use assets obtained in exchange for operating lease obligations 19,726  
Right-of-use assets obtained in exchange for finance lease obligations 2,538  
Purchases of Property, equipment and leasehold improvements included in Accounts payable at end of period $ 199 $ 429