Note 3 - Stock-Based Compensation (Details) (USD $) | 6 Months Ended | 18 Months Ended | | 6 Months Ended | 18 Months Ended | 6 Months Ended | 12 Months Ended |
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Jun. 30, 2011 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 | Jun. 30, 2013 | Jun. 30, 2013 |
Employee Stock Option [Member] | Employee Stock Option [Member] | Employee Stock Option [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | The 2013 ESOP [Member] | The 2013 ESOP [Member] |
| Minimum [Member] | Maximum [Member] | | Minimum [Member] | Maximum [Member] | | |
Note 3 - Stock-Based Compensation (Details) [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | 500,000 | ' | 500,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | ' | ' | ' | ' | ' | '1 year | '3 years | ' | '1 year | '3 years | ' | ' |
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 (in Shares) | ' | ' | ' | ' | 20,500 | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares) | ' | ' | ' | ' | ' | ' | ' | 8,200 | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) | ' | ' | ' | ' | 471,300 | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) | ' | ' | ' | ' | $3.82 | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term | ' | ' | ' | ' | '9 years | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars) | ' | ' | ' | ' | $100,000 | ' | ' | ' | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) | ' | ' | ' | ' | ' | ' | ' | 0 | ' | ' | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value (in Dollars) | ' | ' | ' | ' | ' | ' | ' | 100,000 | ' | ' | ' | ' |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 2.00% |
Share-based Compensation (in Dollars) | 153,000 | 118,000 | ' | ' | ' | ' | ' | ' | ' | ' | 800,000 | ' |
Cash, Cash Equivalents, and Short-term Investments (in Dollars) | ' | ' | ' | 800,000 | ' | ' | ' | ' | ' | ' | ' | ' |
Allocated Share-based Compensation Expense (in Dollars) | 100,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | $100,000 | ' | $100,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | ' | ' | '1 year 328 days | ' | ' | ' | ' | ' | ' | ' | ' | ' |