CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 4,407	$ 7,012
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization of property, plant and equipment and intangible assets	9,665	9,233
Amortization of other long-term assets and deferred loan fees	2,104	2,146
Amortization of discounted liabilities	7
Provision for bad debts	392	445
Revision of deferred consideration		(2,888)
Stock-based compensation	2,545	2,995
Change in deferred income taxes	(1,562)	(572)
Loss from equity method investment	38	60
Net foreign currency adjustment	594	86
Changes in assets and liabilities associated with operations:
Decrease in net receivables	16,421	7,841
Increase in inventories	(21,706)	(27,635)
Increase in prepaid expenses and other assets	(2,297)	(1,844)
Increase in net operating lease liability	7	73
Decrease (increase) in income tax receivable	899	(4,480)
Decrease in accounts payable	(12,351)	(10,224)
Decrease in deferred revenue	(2,431)	(19,438)
Increase in accrued program costs	12,577	11,823
Decrease in other payables and accrued expenses	(3,621)	(6,719)
Net cash provided by (used in) operating activities	5,688	(32,086)
Cash flows from investing activities:
Capital expenditures	(6,386)	(7,216)
Acquisition of business, product lines, and intangible assets	(3,889)	(24,302)
Investments	(1,190)
Net cash used in investing activities	(11,465)	(31,518)
Cash flows from financing activities:
Net borrowings under line of credit agreement	10,502	67,800
Net payments from the issuance of common stock (sale of stock under ESPP, exercise of stock options, and shares purchased for tax withholding)	(2,123)	(513)
Repurchase of common stock		(2,604)
Payment of cash dividends	(1,168)	(1,160)
Net cash provided by financing activities	7,211	63,523
Net increase (decrease) in cash and cash equivalents	1,434	(81)
Effect of exchange rate changes on cash and cash equivalents	585	220
Cash and cash equivalents at beginning of period	6,581	6,168
Cash and cash equivalents at end of period	8,600	6,307
Cash paid during the period for:
Interest	2,902	3,339
Income taxes, net	$ 1,901	$ 7,583