401(k) Plan (Narrative) (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Napco 401 (k) Plan [Member]
Schedule of Deferred Compensation Plans [Line Items]
Deferred compensation plan expense	$ 41,000	$ 0
Marks 401 (k) Plan [Member]
Schedule of Deferred Compensation Plans [Line Items]
Deferred compensation plan expense	$ 3,000	$ 0