Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 2,835,000	$ 7,532,000
Non-cash items included in net income
Depreciation and amortization	3,605,000	3,174,000
Deferred income taxes	(962,000)	(448,000)
Deferred compensation plan	237,000	310,000
Stock compensation expense	1,688,000	2,150,000
Issuance of common shares as compensation	228,000	113,000
Loss on disposition of fixed assets	53,000	1,000
Fixed asset impairment and accelerated depreciation	354,000
Allowance for doubtful accounts	205,000	131,000
Inventory obsolescence reserve	758,000	699,000
Changes in certain assets and liabilities:
Accounts receivable	(2,771,000)	387,000
Inventories	979,000	(3,480,000)
Refundable income taxes		(475,000)
Accounts payable	(176,000)	(5,962,000)
Accrued expenses and other	(2,630,000)	920,000
Customer prepayments	216,000	438,000
Net cash flows provided by operating activities	4,619,000	5,490,000
Cash Flows from Investing Activities
Purchases of property, plant and equipment	(2,744,000)	(3,384,000)
Proceeds from sale of fixed assets	1,000	4,000
Net cash flows (used in) investing activities	(2,743,000)	(3,380,000)
Cash Flows from Financing Activities
Cash dividends paid	(2,513,000)	(1,721,000)
Exercise of stock options	171,000	2,195,000
Purchase of treasury shares	(390,000)	(277,000)
Issuance of treasury shares	44,000	47,000
Net cash flows provided by (used in) financing activities	(2,688,000)	244,000
Increase (decrease) in cash and cash equivalents	(812,000)	2,354,000
Cash and cash equivalents at beginning of period	33,835,000	26,409,000
Cash and cash equivalents at end of period	$ 33,023,000	$ 28,763,000