Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net income	$ 9,546,000	$ 3,346,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for uncollectible accounts receivable	9,000	7,000
Depreciation and amortization	1,772,000	2,431,000
Non-cash equipment impairment charge	0	417,000
Deferred income taxes	(197,000)	(93,000)
Non-cash compensation	724,000	390,000
Pension expense	106,000	31,000
Gain on disposal of assets	(1,866,000)	(62,000)
Changes in operating assets and liabilities:
Accounts receivable	(3,331,000)	(3,067,000)
Inventories	(8,204,000)	276,000
Prepaids and other assets	131,000	(875,000)
Accounts payable and accrued liabilities	7,983,000	(520,000)
Income taxes	1,272,000	173,000
Accrued compensation and employee benefits	1,340,000	224,000
Net cash provided by operating activities	9,285,000	2,678,000
Cash flows from investing activities
Purchases of property and equipment	(10,441,000)	(1,708,000)
Proceeds from sale of property and equipment	3,000,000	90,000
Net cash used in investing activities	(7,441,000)	(1,618,000)
Cash flows from financing activities
Repurchase of common stock	(648,000)	(2,021,000)
Net cash used in financing activities	(648,000)	(2,021,000)
Net increase (decrease) in cash and cash equivalents	1,196,000	(961,000)
Cash and cash equivalents at beginning of year	18,551,000	19,512,000
Cash and cash equivalents at end of year	19,747,000	18,551,000
Supplemental disclosures of cash flow information
Taxes	3,359,000	888,000
Interest		10,000
Disclosure of non-cash activities:
Change in minimum pension liability, net of tax	132,000	141,000
Change in unrealized (loss) gain resulting from change in fair value of derivative instruments, net of tax	$ (218,000)	$ 156,000