CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,805,000	$ 4,373,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	744,000	668,000
Provision for (recovery of) doubtful accounts	39,000	(13,000)
Deferred income taxes	491,000	100,000
Stock based compensation expense	325,000	152,000
Changes in operating assets and liabilities:
Accounts receivable	2,833,000	4,671,000
Inventories	(7,068,000)	(4,608,000)
Prepaid expenses and other current assets	218,000	565,000
Other assets	0	(11,000)
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	426,000	449,000
Net Cash Provided by Operating Activities	4,813,000	6,346,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(1,063,000)	(1,119,000)
Net Cash Used in Investing Activities	(1,063,000)	(1,119,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises	0	24,000
Cash paid for purchase of treasury stock	0	(2,638,000)
Net Cash Used in Financing Activities	0	(2,614,000)
Net Change in Cash and Cash Equivalents	3,750,000	2,613,000
CASH AND CASH EQUIVALENTS - Beginning	8,028,000	5,308,000
CASH AND CASH EQUIVALENTS - Ending	11,778,000	7,921,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid	18,000	17,000
Income taxes paid	$ 734,000	$ 258,000