Note 3 - Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Note 3 - Stock-Based Compensation (Details) [Line Items]
Allocated Share-based Compensation Expense	$ 0.1	$ 0.1
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 124 days
Employee Stock Option [Member] | Minimum [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Employee Stock Option [Member] | Maximum [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Employee Stock Option [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
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	20,500
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	431,800
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	8 years 3 months
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	6,833
Employee Stock Option [Member] | Employee Stock Purchase Plan ESPP [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	2733.00%
Restricted Stock Units (RSUs) [Member] | Minimum [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Restricted Stock Units (RSUs) [Member] | Maximum [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Restricted Stock Units (RSUs) [Member] | The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	44,967
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	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 0.8
The 2012 Stock Incentive Plan [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	500,000