Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 3,468,000	$ (1,660,000)
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization of property, plant and equipment	2,851,000	3,346,000
Amortization of intangible assets with finite lives	4,289,000	5,269,000
Amortization of stock-based compensation	1,046,000	747,000
Amortization of deferred financing costs	548,000	548,000
Write-off of deferred financing costs	3,217,000	0
Loss on disposal of property, plant and equipment	32,000	2,000
(Benefit from) provision for allowance for doubtful accounts	(7,000)	147,000
Provision for excess and obsolete inventory	747,000	693,000
Deferred income tax expense	2,273,000	2,718,000
Changes in assets and liabilities:
Accounts receivable	(12,267,000)	10,719,000
Inventories	(15,240,000)	(10,281,000)
Prepaid expenses and other current assets	3,054,000	1,714,000
Other assets	64,000	(200,000)
Accounts payable	(9,180,000)	610,000
Accrued expenses and other current liabilities	8,526,000	(2,379,000)
Contract liabilities	(2,947,000)	(1,635,000)
Other liabilities, non-current	275,000	(313,000)
Interest payable	(455,000)	(213,000)
Income taxes payable	(4,424,000)	(3,346,000)
Net cash (used in) provided by operating activities	(14,130,000)	6,486,000
Cash flows from investing activities:
Purchases of property, plant and equipment	(1,645,000)	(1,108,000)
Net cash used in investing activities	(1,645,000)	(1,108,000)
Cash flows from financing activities:
Borrowings of long-term debt under Credit Facility	193,400,000	0
Net (payments) borrowings under Revolving Loan portion of Prior Credit Facility	(48,603,000)	6,400,000
Repayment of debt under Term Loan portion of Prior Credit Facility	(120,121,000)	(7,127,000)
Remittance of employees' statutory tax withholdings for stock awards	(5,017,000)	(995,000)
Cash dividends paid	(2,615,000)	(2,459,000)
Payment of deferred financing costs	(1,771,000)	0
Repayment of principal amounts under capital lease and other obligations	(454,000)	(723,000)
Proceeds from issuance of employee stock purchase plan shares	241,000	189,000
Proceeds from exercises of stock options	174,000	0
Net cash provided by (used in) financing activities	15,234,000	(4,715,000)
Net (decrease) increase in cash and cash equivalents	(541,000)	663,000
Cash and cash equivalents at beginning of period	43,484,000	41,844,000
Cash and cash equivalents at end of period	42,943,000	42,507,000
Cash paid (received) during the period for:
Interest	2,470,000	2,164,000
Income taxes, net	25,000	(113,000)
Non-cash investing and financing activities:
Cash dividends declared but unpaid (including dividend equivalents)	2,463,000	2,412,000
Accrued additions to property, plant and equipment	795,000	794,000
Accrued deferred financing costs	41,000	0
Issuance (forfeiture) of restricted stock	$ 1,000	$ (1,000)