Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Trade receivables, allowances for doubtful accounts	$ 6	$ 6
Other receivables, due from non-executive employees	8	10
Acquired patents and other intangibles, accumulated amortization	$ 8,631	$ 7,731
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	100,000	100,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	8,671,461	8,612,590
Common stock, shares outstanding	8,671,461	8,612,590
Series A Junior Participating Preferred Stock [Member]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	25,000	25,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0