Note 3 - Stock-based Compensation (Details Textual) (USD $) | 9 Months Ended |
In Millions, except Share data, unless otherwise specified | Mar. 31, 2015 | Mar. 31, 2014 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 500,000 | |
Allocated Share-based Compensation Expense | $0.20 | $0.10 |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 0.7 | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 2 years 109 days | |
Minimum [Member] | Employee Stock Option [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year | |
Minimum [Member] | Restricted Stock Units (RSUs) [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year | |
Maximum [Member] | Employee Stock Option [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | |
Maximum [Member] | Restricted Stock Units (RSUs) [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | |
Employee Stock Option [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 20,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $3.82 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 7 years 273 days | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 0.1 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | 13,167 | |
Restricted Stock Units (RSUs) [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 39,500 | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | 2,733 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | 0.8 | |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 5,466 | |
Restricted Stock [Member] | The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | 42,233 | |
Expected to be Recognized [Member] | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 0.3 | |
Performance Shares [Member] | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $0.40 | |
The 2012 Stock Incentive Plan [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 431,800 | |