Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Building [Member]
Non-cash items included in net income
(Gain) on disposition of building		$ (343,000)
Net income	$ 8,054,000	3,508,000
Depreciation and amortization	4,903,000	4,728,000
Deferred income taxes	(126,000)	(584,000)
Deferred compensation plan	328,000	62,000
Stock or Unit Option Plan Expense	2,542,000	1,153,000
Issuance of common shares as compensation	168,000	144,000
(Gain) on disposition of fixed assets	$ (87,000)	(2,000)
Loss on sale of subsidiary		565,000
Allowance for doubtful accounts	$ 162,000	268,000
Inventory obsolescence reserve	1,351,000	1,093,000
Changes in certain assets and liabilities:
Accounts receivable	5,588,000	6,579,000
Inventories	(4,440,000)	901,000
Refundable income taxes	(531,000)	1,885,000
Accounts payable	(3,176,000)	(1,884,000)
Accrued expenses and other	812,000	4,340,000
Customer prepayments	(310,000)	(625,000)
Net cash flows provided by operating activities	15,238,000	21,788,000
Cash Flows from Investing Activities
Purchases of property, plant and equipment	$ (8,410,000)	(3,439,000)
Proceeds from sale of subsidiary, net of cash sold		1,494,000
Proceeds from sale of fixed assets	$ 124,000	953,000
Net cash flows (used in) investing activities	8,286,000	992,000
Cash Flows from Financing Activities
Cash dividends paid	(2,959,000)	(2,172,000)
Exercise of stock options	3,604,000	401,000
Purchase of treasury shares	(317,000)	(165,000)
Issuance of treasury shares	90,000	93,000
Net cash flows provided by (used in) financing activities	418,000	(1,843,000)
Increase in cash and cash equivalents	7,370,000	18,953,000
Cash and cash equivalents at beginning of period	26,409,000	9,013,000
Cash and cash equivalents at end of period	$ 33,779,000	$ 27,966,000