Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ (18,132)	$ (25,939)	$ (61,195)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Change in allowance for doubtful accounts	2,008	3,426	85
Depreciation and amortization	50,702	49,684	45,681
Impairment charges - satellite network			31,224
Change in the fair values of acquisition-related contingent consideration	(2,063)	(8,035)	(1,002)
Amortization and write-off of deferred debt fees	776	776	3,106
Stock-based compensation	6,180	7,910	5,673
Foreign exchange (gain) loss	(143)	59	299
Deferred income taxes	(1,213)	(1,491)	(2,047)
Other	2,240
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(5,156)	(14,040)	(10,025)
Inventories	(5,607)	8,277	(16,922)
Prepaid expenses and other assets	2,432	3,994	(10,474)
Accounts payable and accrued liabilities	1,093	(14,876)	12,168
Deferred revenue	(783)	2,708	(1,653)
Other liabilities	(2,250)	(999)	41
Net cash provided by (used in) operating activities	30,084	11,454	(5,041)
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired			(67,911)
Capital expenditures	(21,067)	(22,198)	(27,360)
Other		650	(650)
Net cash used in investing activities	(21,067)	(21,548)	(95,921)
Cash flows from financing activities:
Proceeds from issuance of common stock		27,967	15,000
Proceeds from issuance of long-term debt			250,000
Payment under revolving credit facility		(14,000)
Proceeds from revolving credit facility		14,000
Cash paid for debt issuance costs			(5,359)
Proceeds from employee stock purchase plan	1,076	1,194	1,001
Purchases of common stock under share repurchase program	(9,444)
Principal payment of long-term debt			(150,000)
Payment of deferred purchase consideration			(347)
Net cash (used in) provided by financing activities	(8,368)	29,161	110,295
Effect of exchange rate changes on cash and cash equivalents	(157)	(131)	474
Net increase in cash and cash equivalents	492	18,936	9,807
Cash and cash equivalents:
Beginning of year	53,766	34,830	25,023
End of year	54,258	53,766	34,830
Cash paid for:
Interest	20,000	20,036	12,911
Income taxes	$ 4,810	$ 5,532	$ 805