Note 7 - Stockholders' Equity (Tables)

9 Months Ended

Mar. 31, 2017

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life		Aggregate Intrinsic Value
Outstanding at June 30, 2016		104,378		$	14.85
Granted		251,325		$	2.92
Forfeited		(19,013	)	$	6.78
Expired		(2,500	)	$	18.46
Outstanding at March 31, 2017		334,190		$	6.31		5.8	$	89
Vested and Expected to Vest at March 31, 2017		309,878		$	6.55		5.7	$	81
Exercisable at March 31, 2017		208,534		$	8.08		5.3	$	48

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Expected life (years)	4.2
Risk-free interest rate	1.1	%
Expected volatility	103	%
Dividend yield	0	%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Weighted Average
	Number of Shares			Grant Date Fair Value
Balance at June 30, 2016		63,566		$	14.96
Granted		247,168		$	2.27
Vested		(235,567	)	$	4.77
Forfeited		(933	)	$	26.37
Outstanding at March 31, 2017		74,234		$	4.91