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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net income $ 6,329 $ 696
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization of fixed and intangible assets 8,359 7,864
Amortization of other long term assets 2,358 2,734
Amortization of discounted liabilities 19 154
Stock-based compensation 1,068 2,485
Tax benefit from exercise of stock options (47) (7)
Operating loss from equity investment 129 191
Changes in assets and liabilities associated with operations:    
(Increase) decrease in net receivables (4,156) 8,975
(Increase) decrease in inventories (14,625) 397
(Increase) decrease in prepaid expenses and other assets (2,661) 143
Decrease (increase) in income tax receivable/payable, net 1,244 (878)
Increase (decrease) in accounts payable 9,837 (392)
(Decrease) increase in deferred revenue (1,932) 3,611
Increase in program payables 17,956 17,057
Increase in other payables and accrued expenses 1,612 794
Net cash provided by operating activities 25,490 43,824
Cash flows from investing activities:    
Capital expenditures (1,729) (3,480)
Investment (3,283) (125)
Acquisitions of product lines and other intangible assets (224) (36,435)
Net cash used in investing activities (5,236) (40,040)
Cash flows from financing activities:    
Net payments under line of credit agreement (18,850) (11,120)
Increase in other notes payable   10,000
Payments on other long-term liabilities (457) (899)
Tax benefit from exercise of stock options 47 7
Payment of cash dividends   (1,141)
Net proceeds from sale of stock under ESPP and exercise of stock options (195) (40)
Net cash used in financing activities (19,455) (3,193)
Net increase in cash and cash equivalents 799 591
Cash and cash equivalents at beginning of period 5,524 4,885
Effect of exchange rate changes on cash (524) (387)
Cash and cash equivalents at end of period $ 5,799 $ 5,089