Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES:
Net income (loss)	$ 12,401	$ 10,141
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	3,633	4,058
Deferred income taxes	720	617
Stock-based compensation expense	592	925
Excess tax benefit from stock-based payment arrangements		(1,182)
Provision for losses on accounts receivable	(75)	(40)
Gain on disposition of capital assets	(1,794)	(143)
Changes in operating assets and liabilities:
Trade receivables	(5,014)	604
Inventories	(10,827)	(10,379)
Other current assets	(391)	1,063
Other assets		(73)
Accounts payable - trade	1,584	6,676
Accrued liabilities	325	437
Other long-term liabilities	146	(585)
Net cash provided by operating activities	1,300	12,119
INVESTING ACTIVITIES:
Purchases of investments	(20,099)	(1,699)
Proceeds from sales of investments	18,045	1,600
Proceeds from sale of capital assets	6,152	143
Capital expenditures	(12,902)	(6,005)
Net cash (used in) provided by investing activities	(8,804)	(5,961)
FINANCING ACTIVITIES:
Dividends paid	(3,290)	(2,941)
Proceeds from issuance of common stock	51	770
Shares withheld for employee tax obligations	(552)	(1,132)
Excess Tax Benefit from Share-based Compensation, Financing Activities		(1,182)
Net cash used in financing activities	(3,791)	(2,121)
Increase (decrease) in cash and cash equivalents	(11,295)	4,037
Cash and cash equivalents at beginning of year	28,874	36,780
Cash and cash equivalents at end of year	17,579	40,817
SUPPLEMENTAL INFORMATION CASH PAID DURING THE PERIOD FOR:
Income taxes paid (refunded)	5,050	2,440
Capital Expenditures Incurred but Not yet Paid	$ 1,826	$ 2,388