Note 4 - Stock Based Compensation (Details) (USD $) | 3 Months Ended |
Dec. 31, 2013 | Dec. 31, 2012 |
Note 4 - Stock Based Compensation (Details) [Line Items] | ' | ' |
Share-based Compensation | $188,160 | $186,049 |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 1,740,908 | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | '3 years 255 days | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | 0 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | '3 years 292 days | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 14,279,748 | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term | '3 years 328 days | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | 12,114,284 | ' |
Proceeds from Stock Options Exercised | $25,327 | $7,625 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares) | 20,400 | 16,037 |
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date | 85.00% | ' |
Restricted Stock [Member] | Minimum [Member] | ' | ' |
Note 4 - Stock Based Compensation (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | '1 year | ' |
Restricted Stock [Member] | Maximum [Member] | ' | ' |
Note 4 - Stock Based Compensation (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | '5 years | ' |
Employee Stock Purchase Plan [Member] | ' | ' |
Note 4 - Stock Based Compensation (Details) [Line Items] | ' | ' |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in Shares) | 10,920 | 18,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) | $8.28 | $3.82 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) | 192,325 | ' |