Note 11 - Stock-based Compensation (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 51 Months Ended | 56 Months Ended | 67 Months Ended | |
Nov. 30, 2016 | Sep. 30, 2016 | Aug. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jan. 31, 2015 | Nov. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jul. 31, 2013 | Jul. 30, 2013 | [1] | Jun. 30, 2013 | Dec. 31, 2012 | Dec. 30, 2012 | [3] | Jul. 31, 2012 | Sep. 30, 2011 | Nov. 30, 2010 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2017 | Mar. 31, 2017 | Jun. 30, 2016 |
Restricted Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 198,997 | | | | 198,997 | | 198,997 | 198,997 | 198,997 | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | | | | | | | | | | | | | | | | | | | | | | $ 2,632,456 | | | | $ 2,632,456 | | $ 2,632,456 | $ 2,632,456 | $ 2,632,456 | |
The 2010 Plan [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | | | | | | | | | | | | | | | | | | | | | | 1,000,000 | | | | 1,000,000 | | 1,000,000 | 1,000,000 | 1,000,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | | | | | | | | | | | | | | | | | | | | | | 307,000 | | | | 307,000 | | 307,000 | 307,000 | 307,000 | 405,000 |
Allocated Share-based Compensation Expense | | | | | | | | | | | | | | | | | | | | | | $ 413,006 | | | $ 70,232 | $ 1,372,656 | $ 437,452 | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | | | | | | | | | | 5,000 | 37,500 | [2] | | 250,000 | 100,000 | [4] | 50,000 | [5] | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | | | | | | | | | | | | | | | | | | | | | | | | | | 98,000 | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | | | | | | | | | | | | | | | | | | | | | | 1 year | | | | | | | | | |
The 2010 Plan [Member] | Directors and Officers [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | | | | | | | | | | | | | 175,000 | | 75,000 | | 40,000 | | | | | | | | | | | | |
The 2010 Plan [Member] | Former Technical Consultant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | | | | | | | | | | | | | 75,000 | | 25,000 | | 10,000 | | | | | | | | | | | | |
The 2010 Plan [Member] | Directors, Executives, and a Former Technical Consultant [Member] | September 2011 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 15,000 | |
The 2010 Plan [Member] | Directors, Executives, and a Former Technical Consultant [Member] | July 2012 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 25,000 | | |
The 2010 Plan [Member] | Directors, Executives, and a Former Technical Consultant [Member] | December 2012 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | | | | | | | | | | | | | | | | | | | | | | | | | | | | 50,000 | | | |
The 2010 Plan [Member] | Executives [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | | | | | | | | 52,500 | | | 37,500 | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Employee [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | | | | | | | | | 5,000 | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Current and Former Executives, Directors, and Consultants [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | | | | | | | | | | | | | | | | | | | | | | 0 | 18,000 | 80,000 | | | | | | | |
Stock Issued During Period, Shares, Cashless Stock Options Exercised | | | | | | | | | | | | | | | | | | | | | | | 9,357 | 42,817 | | | | | | | |
Proceeds from Stock Options Exercised | | | | | | | | | | | | | | | | | | | | | | | $ 0 | $ 0 | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 198,997 | | | | 198,997 | | 198,997 | 198,997 | 198,997 | |
The 2010 Plan [Member] | Restricted Stock [Member] | Directors and Officers [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | | | | | | | | | | | | | | | | | 70,429 | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Former Technical Consultant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | | | | | | | | | | | | | | | | | 23,477 | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Former Technical Consultant [Member] | January 2015 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | | | 10,000 | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Directors, Executives, and a Former Technical Consultant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | | | | | 95,000 | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Directors, Executives, and a Former Technical Consultant [Member] | December 2013 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Directors, Executives, and a Former Technical Consultant [Member] | December 2013 Grant [Member] | Vesting on the Date of Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | | | | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | 100,000 | | 85,000 | | 27,000 | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | November 2014 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 9,000 | | | | 9,000 | | 9,000 | 9,000 | 9,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | November 2014 Grant [Member] | Vesting on the Date of Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | | | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | November 2014 Grant [Member] | Vesting in January 2019 [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | September 2015 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 28,332 | | | | 28,332 | | 28,332 | 28,332 | 28,332 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | September 2015 Grant [Member] | Vesting on the Date of Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | August 2016 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 73,333 | | | | 73,333 | | 73,333 | 73,333 | 73,333 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Executives [Member] | August 2016 Grant [Member] | Vesting on the Date of Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Non-executive Directors [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | 40,000 | | 30,000 | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Non-executive Directors [Member] | January 2015 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | | | | | | | 10,000 | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Non-executive Directors [Member] | January 2015 Grant [Member] | Vesting Equally Over Two Years [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | | | | 0.6667% | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Non-executive Directors [Member] | December 2015 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 13,332 | | | | 13,332 | | 13,332 | 13,332 | 13,332 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | 2 years | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Non-executive Directors [Member] | December 2015 Grant [Member] | Vesting on the Date of Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Two Executives [Member] | September 2015 Grant [Member] | Vesting in January 2019 [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | | | 0.3333% | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Restricted Stock [Member] | Non-Executive Directors [Member] | November 2016 Grant [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | | | | | | | | | | | | | | | | | | | | | | 75,000 | | | | 75,000 | | 75,000 | 75,000 | 75,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | 75,000 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The 2010 Plan [Member] | Employee Stock Option [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | | | | | | | | | | | | | | | | | | | | | | 307,000 | | | | 307,000 | | 307,000 | 307,000 | 307,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | [6] | | | | | | | | | | | | | | | 2 years | 2 years | [4] | 2 years | [5] | | | | | | | | | | | |
| |
[1] | The Company granted 5,000 stock options to an employee of Avalon for services performed during fiscal year 2013. | |
[2] | The Company granted 37,500 stock options to its executives for services performed during fiscal year 2013. | |
[3] | The Company granted 175,000 stock options to its directors and executives and an additional 75,000 stock options to a former technical consultant for services performed during fiscal year 2013. Of the total options granted as a part of this grant, 50,000 were later forfeited. | |
[4] | The Company granted 75,000 stock options to its directors and executives and an additional 25,000 stock options to a former technical consultant for services performed during fiscal year 2012. Of the total options granted as a part of this grant, 25,000 were later forfeited. | |
[5] | The Company granted 40,000 stock options to its directors and executives and an additional 10,000 stock options to a former technical consultant, for services performed during fiscal year 2011. Of the total options granted 15,000 were later forfeited. | |
[6] | If at any time there occurs a change of control, as defined in the 2010 Plan, any options that are unvested at that time will immediately vest. The Company's Compensation Committee has determined that the Transactions do not constitute a change of control under the 2010 Plan. | |