4. Fair Value of Financial Instruments (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Cash and cash equivalents	$ 927,300	$ 769,300	$ 907,800
Available for sale securities	908,400	718,300
Total	1,835,700	1,487,600
Liabilities:
Contingent consideration	70,600	107,400
Level 1
Cash and cash equivalents	927,300	769,300
Available for sale securities	908,400	718,300
Total	1,835,700	1,487,600
Liabilities:
Contingent consideration
Level 2
Cash and cash equivalents
Available for sale securities
Total
Liabilities:
Contingent consideration
Level 3
Cash and cash equivalents
Available for sale securities
Total
Liabilities:
Contingent consideration	$ 70,600	$ 107,400