CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Operating Activities:
Net loss	$ (10,769)	$ (2,011)	$ (21,383)	$ (11,797)
Net (income) loss from discontinued operations	1,339	(1,335)	1,339	(2,984)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	17,587	11,058	33,598	23,491
Share-based compensation expense	3,638	870	6,358	2,497
Change in fair value of contingent consideration	241	154	670	452
Loss on disposal of assets		(1,474)		(1,474)
Deferred income taxes	(5,825)	(185)	(5,825)	(185)
Changes in operating assets and liabilities, net of effects from acquisitions:	(28,754)	5,417	(98,467)	(9,021)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(22,543)	12,494	(83,710)	979
NET CASH PROVIDED BY OPERATING ACTIVITIES FROM DISCONTINUED OPERATIONS		21,556		6,133
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(22,543)	34,050	(83,710)	7,112
Investing Activities:
Acquisition of businesses, net of cash acquired	(148,704)	(4,884)	(395,854)	(9,534)
Purchases of property, plant and equipment	(10,132)	(5,468)	(22,177)	(11,786)
Proceeds from sale of assets		2,400		2,400
Purchase of non-marketable debt and equity securities		(579)		(1,250)
NET CASH USED IN INVESTING ACTIVITIES	(158,836)	(8,531)	(418,031)	(20,170)
Financing Activities:
Proceeds from short-term borrowings	242,500	37,120	614,500	119,120
Principal payments on short-term borrowings	(98,000)	(48,120)	(405,500)	(97,120)
Proceeds from stock issued under employee stock purchase plan	783	798	783	798
Purchase of common stock		(68)	(3,419)	(2,324)
Dividends paid	(4,205)	(3,676)	(4,205)	(3,676)
Contingent consideration payments related to acquisitions of businesses	(385)		(820)	(656)
Proceeds from equity offering, net			215,832
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	150,393	(13,946)	432,669	16,142
Effect of exchange rates on cash	(622)	(1,209)	1,340	(532)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(31,608)	10,364	(67,732)	2,552
Cash and cash equivalents at the beginning of the period	103,484	60,765	139,608	68,577
CASH AND CASH EQUIVALENTS AT THE END OF THE PERIOD	71,876	$ 71,129	71,876	$ 71,129
Trafficware
Supplemental disclosure of non-cash investing and financing activities:
Receivable recognized in connection with the acquisition of net			1,588
Gridsmart
Supplemental disclosure of non-cash investing and financing activities:
Receivable recognized in connection with the acquisition of net	442		442
Nuvotronics
Supplemental disclosure of non-cash investing and financing activities:
Receivable recognized in connection with the acquisition of net	166		166
Liability incurred to acquire Nuvotronics, net	4,900		4,900
OpCo.
Financing Activities:
Proceeds from long-term borrowings	$ 9,700		$ 15,498