Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (23,226)	$ (12,999)	$ (4,525)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Change in allowance for doubtful accounts	310	676	427
Depreciation and amortization	42,803	26,571	10,856
Impairment loss – satellite network	10,680	12,748	605
Change in the fair values of acquisitions-related contingent consideration	(360)	(1,606)	(2,132)
Amortization of the fair value adjustment related to StarTrak warranty liabilities	(57)	(12)	(164)
Amortization and write-off of deferred debt fees	835	464	869
Stock-based compensation	5,023	4,620	3,610
Foreign exchange (gains) losses	(106)	(413)	(227)
Increase in fair value of indemnification assets			(126)
Loss on settlement agreement in connection with the indemnification assets			97
Deferred income taxes	256	825	(276)
Other			173
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(1,702)	8,045	(6,882)
Inventories	(1,950)	(7,953)	(5,291)
Prepaid expenses and other assets	(4,574)	(449)	(173)
Accounts payable and accrued liabilities	4,893	(2,995)	5,353
Deferred revenue	(3,332)	(1,126)	611
Other liabilities	(567)	(313)	397
Net cash provided by operating activities	28,926	26,083	3,202
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(3,452)	(141,575)	(28,883)
Capital expenditures	(28,424)	(70,017)	(45,543)
Cash held for acquisition		123,000	(123,000)
Proceeds received from settlement agreement in connection with indemnification assets			691
Proceeds from warranty claim on acquired inventory			167
Change in restricted cash	1,000		1,000
Other	(198)
Net cash used in investing activities	(31,074)	(88,592)	(195,568)
Cash flows from financing activities:
Proceeds received from issuance of common stock in connection with public offerings, net of underwriters’ discounts and commissions and offering costs			114,798
Proceeds received from issuance of long-term debt		10,000	150,000
Cash paid for debt issuance costs		(942)	(3,652)
Proceeds received from exercise of stock options		244	101
Proceeds received from employee stock purchase plan	345
Principal payment of long-term debt		(10,000)	(45,000)
Principal payments of capital leases			(163)
Payment of deferred purchase consideration	(342)	(1,106)	(25)
Net cash provided by (used in) financing activities	3	(1,804)	216,059
Effect of exchange rate changes on cash and cash equivalents	91	(175)	(482)
Net (decrease) increase in cash and cash equivalents	(2,054)	(64,488)	23,211
Cash and cash equivalents:
Beginning of year	27,077	91,565	68,354
End of year	25,023	27,077	91,565
Cash paid for:
Interest	8,787	9,005	3,324
Income taxes	$ (94)	$ 723	$ 692