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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating Activities    
Net income $ 3,284 $ 2,720
Adjustments to reconcile net income to net cash provided by operating activities    
Depreciation and amortization 12,637 12,310
Loss on disposal of fixed assets 355 0
Share-based compensation expense 8,410 6,528
Deferred income taxes 3,075 (5,128)
Amortization of operating lease right-of-use assets 2,602 0
Amortization of debt financing fees 573 573
Changes in operating assets and liabilities:    
Accounts receivable and unbilled receivables (7,251) (632)
Inventories (2,936) (6,881)
Prepaid expenses 3,652 (769)
Other current assets 373 (997)
Investment in sales-type leases (2,641) (1,491)
Prepaid commissions 2,474 1,796
Other long-term assets 5,206 (1,673)
Accounts payable (233) (9,416)
Accrued compensation (12,604) 2,391
Accrued liabilities 127 4,276
Deferred revenues 7,989 15,118
Operating lease liabilities (2,669) 0
Other long-term liabilities 4,074 131
Net cash provided by operating activities 26,497 18,856
Investing Activities    
Software development for external use (11,717) (5,272)
Purchases of property and equipment (4,980) (9,268)
Net cash used in investing activities (16,697) (14,540)
Financing Activities    
Repayment of debt and revolving credit facility (39,000) (2,500)
At the market offering, net of offering costs 20,216 0
Proceeds from stock issuances under stock-based compensation plans 20,526 9,541
Employees’ taxes paid related to restricted stock units (1,920) (1,300)
Net cash provided by (used in) financing activities (178) 5,741
Effect of exchange rate changes on cash and cash equivalents 430 1,292
Net increase in cash and cash equivalents 10,052 11,349
Cash and cash equivalents at beginning of period 67,192 32,424
Cash and cash equivalents at end of period 77,244 43,773
Supplemental disclosure of non-cash activities    
Unpaid purchases of property and equipment 1,454 676
Property and equipment transferred to inventory 105 0
Right-of-use assets obtained in exchange for new lease liabilities $ 431 $ 0