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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Cash flows from operating activities:    
Net income $ 520 $ 3,906
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization of fixed and intangible assets 4,762 4,609
Amortization of other long-term assets and debt issuance costs 1,026 1,082
Amortization of discounted liabilities 4  
Provision for bad debts 359 1,034
Revision of deferred compensation   (1,543)
Stock-based compensation 1,357 1,485
Decrease in deferred income taxes (910) (742)
Loss from equity method investment 13 24
Net foreign currency adjustment 823 172
Changes in assets and liabilities associated with operations:    
Decrease (increase) in net receivables (5,472) 6,812
Increase in inventories (16,446) (23,763)
Increase in prepaid expenses and other assets (776) (2,724)
Decrease (increase) in income tax receivable/payable, net (597) 750
(Decrease) increase in accounts payable (189) 4,788
Decrease in deferred revenue (2,342) (16,036)
Increase in accrued program costs 6,016 2,391
Decrease in other payables and accrued expenses (2,094) (2,508)
Net cash used in by operating activities (13,946) (20,263)
Cash flows from investing activities:    
Capital expenditures (2,980) (3,369)
Acquisitions of businesses, product lines and intangible assets   (24,246)
Net cash used in investing activities (2,980) (27,615)
Cash flows from financing activities:    
Net borrowings under line of credit agreement 19,400 52,600
Net payments from the issuance of common stock (sale of stock under ESPP, exercise of stock options, and shares purchased for tax withholdings) (2,177) (550)
Repurchase of common stock   (2,604)
Payment of cash dividends (582) (581)
Net cash provided by financing activities 16,641 48,865
Net (decrease) increase in cash and cash equivalents (285) 987
Effect of exchange rate changes on cash and cash equivalents (752) (498)
Cash and cash equivalents at beginning of period 6,581 6,168
Cash and cash equivalents at end of period $ 5,544 6,657
Non-cash investing activities:    
Deferred consideration in connection with business acquisitions:   $ 2,645