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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Cash flows from operating activities:    
Net income (loss) $ 3,739 $ (118)
Adjustments to reconcile net income (loss) from operations to net cash provided by (used in) operations:    
Depreciation, amortization, and impairment of intangible assets 8,579 9,066
Loss (gain) on disposal of assets   (49)
Deferred tax expense (benefit) (508) (3,020)
Stock-based compensation 1,778 2,916
Accounts receivable, net (18,988) 6,183
Inventories, net (4,549) (3,267)
Contract assets (74) (2,892)
Accounts payable 5,895 (5,258)
Income taxes payable (2,587) (8,433)
Accrued expenses (2,351) (911)
Deferred compensation (47) (541)
Deferred revenue (2,318) (405)
Other assets and liabilities (2,231) (2,476)
Net cash used in operating activities (13,662) (9,205)
Cash flows from investing activities:    
Purchase of short term investments (24,663)  
Maturities of short term investments 21,250 80,000
Purchase of Dealflo, net of cash acquired   (53,065)
Additions to property and equipment (4,196) (3,410)
Net cash provided by (used in) investing activities (7,609) 23,525
Cash flows from financing activities:    
Tax payments for restricted stock issuances (394) (399)
Net cash used in financing activities (394) (399)
Effect of exchange rate changes on cash (154) (647)
Net increase (decrease) in cash (21,819) 13,274
Cash, cash equivalents, and restricted cash, beginning of period 77,555 78,661
Cash, cash equivalents, and restricted cash, end of period 55,736 91,935
Supplemental cash flow disclosures:    
Cash, cash equivalents, and restricted cash $ 77,555 $ 78,661