CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 6,700,000	$ 1,982,000	$ 5,527,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,670,000	1,628,000	1,219,000
Deferred income taxes	(270,000)	15,000	(148,000)
Stock based compensation expense	736,000	775,000	794,000
Adjustment of contingent earnout liability	500,000	4,500,000	0
Change in operating assets and liabilities, net of SeaBotix Inc. acquisition effect in 2011:
Accounts receivable	(3,439,000)	(945,000)	(372,000)
Inventories	571,000	(1,707,000)	(939,000)
Other assets	(92,000)	(148,000)	(151,000)
Accounts payable	875,000	989,000	(482,000)
Accrued expenses	507,000	672,000	17,000
Income taxes payable	(341,000)	164,000	(199,000)
Net cash provided by operating activities	7,417,000	7,925,000	5,266,000
Cash Flows From Investing Activities:
Purchase of SeaBotix Inc., net of cash acquired of $316,000 in 2011	(2,185,000)	(4,060,000)	(11,184,000)
Capital expenditures and other non-current assets	(792,000)	(1,060,000)	(417,000)
Net cash used by investing activities	(2,977,000)	(5,120,000)	(11,601,000)
Cash Flows From Financing Activities:
Dividends paid	(6,550,000)	(9,005,000)	0
Purchase of treasury stock	0	(966,000)	(877,000)
Exercise of stock options	286,000	79,000	0
Tax asset (liability) from vested restricted stock and stock options exercised	27,000	17,000	(34,000)
Repayment of SeaBotix Inc. debt assumed in acquisition	0	0	(539,000)
Net cash used by financing activities	(6,237,000)	(9,875,000)	(1,450,000)
Net decrease in cash and cash equivalents	(1,797,000)	(7,070,000)	(7,785,000)
Cash and cash equivalents at beginning of year	24,613,000	31,683,000	39,468,000
Cash and cash equivalents at end of year	22,816,000	24,613,000	31,683,000
Supplemental disclosure of cash flow information:
Income taxes paid	4,209,000	2,562,000	3,026,000
Non cash transactions:
Transfer of property, plant and equipment to inventory	$ 0	$ 627,000	$ 0