4. Fair Value of Financial Instruments (Details) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Cash and cash equivalents	$ 769,300	$ 907,800	$ 632,700
Available for sale securities	718,300	693,400
Total	1,487,600	1,601,200
Contingent consideration	107,400
Level 1
Cash and cash equivalents	769,300	907,800
Available for sale securities	718,300	693,400
Total	1,487,600	1,601,200
Contingent consideration
Level 2
Cash and cash equivalents
Available for sale securities
Total
Contingent consideration
Level 3
Cash and cash equivalents
Available for sale securities
Total
Contingent consideration	$ 107,400