Unaudited Consolidated Statements of Changes in Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income	$ 6,088	$ 6,477
Reconciliation of net income to cash flows provided by operating activities:
Depreciation and amortization	28,640	27,391
Amortization of deferred financing fees (includes $0 and $0 write off of deferred financing fees)	467	526
Deferred income taxes	251	258
Share-based compensation	5,203	3,019
(Gain) loss on sale of property, plant, and equipment	(4)	19
Foreign currency exchange losses (gains) on intercompany loans and other non-cash items	1,502	(6,459)
Changes in assets and liabilities
Accounts receivable	41,309	18,083
Inventories	(16,021)	(11,551)
Contract assets	(12,189)	21,458
Prepaids and other current assets	(3,797)	(465)
Accounts payable	11,241	(12,652)
Accrued expenses and other liabilities	(16,953)	(24,701)
Contract liabilities	(2,887)	8,010
Income taxes	(338)	(1,271)
Other non‑current assets and liabilities	(6,132)	(4,873)
Net cash provided by operating activities	36,380	23,269
Investing activities
Purchase of property, plant, and equipment	(15,540)	(17,260)
Purchase of intangibles	(664)	(81)
Proceeds from sale of property, plant, and equipment	1,370	127
Acquisitions, net of cash received $0 and $0	0	(8,743)
Net cash used in investing activities	(14,834)	(25,957)
Financing activities
Issuance of debt, net of deferred issuance costs	5,949	7,805
Repayment of debt	(19,378)	(5,723)
Repayment of finance lease obligation	(3,174)	(3,821)
Proceeds from issuance of common stock	2,085	6,617
Taxes paid related to net share settlements of share-based compensation awards	(1,261)	(9)
Distribution to non‑controlling interest	(100)	(250)
Net cash (used in) provided by financing activities	(15,879)	4,619
Effect of exchange rate changes on cash	614	2,988
Change in cash and cash equivalents	6,281	4,919
Cash and cash equivalents
Beginning of period	146,244	193,001
End of period	152,525	197,920
Supplemental disclosure of cash flow information
Cash paid for taxes	1,654	1,334
Cash paid for interest	5,706	7,624
Non‑cash investing and financing activities
Finance lease transactions	2,700	5,484
Operating lease transactions	$ 1,152	$ 5,954