Condensed Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2012	Dec. 31, 2011
Net sales	$ 38,002	$ 35,737		$ 77,064	$ 74,457
Cost of sales	22,987	24,395		47,634	48,591
Gross profit	15,015	11,342		29,430	25,866
Operating Expenses:
Marketing	2,376	2,438		4,915	5,033
Research and development	3,243	3,124		6,577	7,049
General and administrative	4,317	4,372		8,867	8,787
Total operating expenses	9,936	9,934		20,359	20,869
Operating income	5,079	1,408	[1]	9,071	4,997	[1]
Other income (expense):
Interest expense	(47)	(53)		(65)	(133)
Other income	138	139		360	279
Total other income, net	91	86		295	146
Income before income tax expense	5,170	1,494		9,366	5,143
Income tax expense	1,657	320		3,000	1,440
Net income	$ 3,513	$ 1,174		$ 6,366	$ 3,703
Earnings per share:
Basic (in Dollars per share)	$ 0.28	$ 0.08		$ 0.50	$ 0.26
Diluted (in Dollars per share)	$ 0.27	$ 0.08		$ 0.47	$ 0.25
Weighted average common shares outstanding:
Basic (in Shares)	12,697	14,244		12,848	14,180
Diluted (in Shares)	13,191	14,861		13,433	14,825

[1] Unallocated amounts relate to the lease expense incurred on the Company's operating lease located in England.