Note 3 - Short Term Investments Available For Sale (Detail) - Securities in an Unrealized Loss Position (USD $)	Dec. 31, 2012	Dec. 31, 2011
Available for Sale
Securities in an Unrealized Loss Position Less Than 12 Months Fair Value	$ 8,037,620	$ 10,157,160
Securities in an Unrealized Loss Position Less Than 12 Months Aggregate Losses	(126,607)	(262,251)
Securities in an Unrealized Loss Position 12 Months or Longer Fair Value	0	0
Securities in an Unrealized Loss Position 12 Months or Longer Aggregate Losses	0	(14,449)
Securities in an Unrealized Loss Position Fair Value	8,037,620	10,157,160
Securities in an Unrealized Loss Position Aggregate Losses	(126,607)	(276,700)
Corporate Debt Securities [Member]
Available for Sale
Securities in an Unrealized Loss Position Less Than 12 Months Fair Value	8,037,620	10,157,160
Securities in an Unrealized Loss Position Less Than 12 Months Aggregate Losses	(126,607)	(168,327)
Securities in an Unrealized Loss Position 12 Months or Longer Fair Value	0	0
Securities in an Unrealized Loss Position 12 Months or Longer Aggregate Losses	0	0
Securities in an Unrealized Loss Position Fair Value	8,037,620	10,157,160
Securities in an Unrealized Loss Position Aggregate Losses	(126,607)	(168,327)
Equity Securities [Member]
Available for Sale
Securities in an Unrealized Loss Position Less Than 12 Months Fair Value	0	0
Securities in an Unrealized Loss Position Less Than 12 Months Aggregate Losses	0	(93,924)
Securities in an Unrealized Loss Position 12 Months or Longer Fair Value	0	0
Securities in an Unrealized Loss Position 12 Months or Longer Aggregate Losses	0	(14,449)
Securities in an Unrealized Loss Position Fair Value	0	0
Securities in an Unrealized Loss Position Aggregate Losses	$ 0	$ (108,373)