CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flows from operating activities
Net income	$ 31,187	$ 12,227
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	14,695	7,048
Loss on extinguishment of debt	6,091
Stock-based compensation expense	3,593	3,087
Amortization of debt discounts and financing costs included in interest expense	828
Debt repricing transaction costs	602
Deferred income tax benefit	(11,780)	(821)
Derivative fair value gain	(3,873)
Other	(77)	53
Changes in operating assets and liabilities
Accounts receivable — trade	(2,041)	(2,585)
Accounts receivable — other	1,554	1,846
Inventories	(2,272)	1,002
Other current and noncurrent assets	442	(302)
Accounts payable	2,579	951
Accrued liabilities and other	(5,293)	(3,083)
Net cash provided by operating activities	36,235	19,423
Cash flows from investing activities
Additions to property, plant and equipment	(9,030)	(5,310)
Other investing activities	(1,262)
Proceeds — insurance claim		250
Net cash used in investing activities	(10,292)	(5,060)
Cash flows from financing activities
Proceeds from sale of common stock, net of issuance costs	175,669
Borrowings under credit facility		17,000
Payments under credit facility		(11,800)
Principal payments on borrowings on term loan	(196,000)
Debt repricing transaction costs	(602)
Payment of dividends	(822)	(709)
Cash payments related to tax withholdings from stock-based awards	(3,729)	(277)
Net cash provided by (used in) financing activities	(25,484)	4,214
Effect of exchange rate changes on cash	799	(418)
Net increase in cash, cash equivalents and restricted cash	1,258	18,159
Cash, cash equivalents and restricted cash at beginning of period	20,708	13,428
Cash, cash equivalents and restricted cash at end of period	21,966	31,587
Supplemental disclosures of cash flow information
Cash paid for interest	11,856	244
Cash paid for income taxes, net	3,564	4,740
Supplemental disclosure of non-cash investing activities
Purchase of property, plant and equipment through accounts payable	$ 280	$ 206