Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities:
Net loss	$ (1,660,000)	$ (2,489,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization of property, plant and equipment	3,346,000	3,749,000
Amortization of intangible assets with finite lives	5,269,000	6,055,000
Amortization of stock-based compensation	747,000	970,000
Amortization of deferred financing costs	548,000	484,000
Loss on disposal of property, plant and equipment	2,000	1,000
Provision for allowance for doubtful accounts	147,000	339,000
Provision for excess and obsolete inventory	693,000	637,000
Excess income tax benefit from stock-based awards	0	(50,000)
Deferred income tax expense (benefit)	2,718,000	(120,000)
Changes in assets and liabilities:
Accounts receivable	10,719,000	13,680,000
Inventories	(10,281,000)	(4,942,000)
Prepaid expenses and other current assets	1,714,000	473,000
Other assets	(200,000)	86,000
Accounts payable	610,000	(3,348,000)
Accrued expenses and other current liabilities	(2,379,000)	(2,105,000)
Customer advances and deposits	(1,635,000)	(1,691,000)
Other liabilities, non-current	(313,000)	(420,000)
Interest payable	(213,000)	(77,000)
Income taxes payable	(3,346,000)	(3,446,000)
Net cash provided by operating activities	6,486,000	7,786,000
Cash flows from investing activities:
Purchases of property, plant and equipment	(1,108,000)	(2,075,000)
Net cash used in investing activities	(1,108,000)	(2,075,000)
Cash flows from financing activities:
Net borrowings under Revolving Loan Facility	6,400,000	1,000,000
Repayment of long-term debt under Term Loan Facility	(7,127,000)	(2,212,000)
Cash dividends paid	(2,459,000)	(7,123,000)
Remittance of employees' statutory tax withholdings for stock awards	(995,000)	(163,000)
Repayment of principal amounts under capital lease obligations	(723,000)	(943,000)
Proceeds from issuance of employee stock purchase plan shares	189,000	183,000
Payment of issuance costs related to equity offering	0	(492,000)
Payment of deferred financing costs	0	(105,000)
Excess income tax benefit from stock-based awards	0	50,000
Net cash used in financing activities	(4,715,000)	(9,805,000)
Net increase (decrease) in cash and cash equivalents	663,000	(4,094,000)
Cash and cash equivalents at beginning of period	41,844,000	66,805,000
Cash and cash equivalents at end of period	42,507,000	62,711,000
Cash paid (received) during the period for:
Interest	2,164,000	2,849,000
Income taxes, net	(113,000)	2,004,000
Non-cash investing and financing activities:
Cash dividends declared but unpaid (including dividend equivalents)	2,412,000	7,137,000
Accrued additions to property, plant and equipment	794,000	1,225,000
(Forfeiture) issuance of restricted stock	$ (1,000)	$ 14,000