Note 7 - Stockholders' Equity (Tables)

3 Months Ended

Sep. 30, 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, 2017		397,389		$	5.80
Granted		40,000		$	3.47
Forfeited		(14,765	)	$	3.52
Expired		(2,439	)	$	27.04
Outstanding at September 30, 2017		420,185		$	5.54		6	$	182,000
Vested and expected to v est at September 30, 2017		397,590		$	5.66		6	$	175,000
Exercisable at September 30, 2017		278,487		$	6.64		5.5	$	128,000

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

Expected life (years)	4
Risk-free interest rate	1.7	%
Expected volatility	108	%
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, 2017		59,694		$	4.62
Granted		10,000		$	3.26
Vested		(60,531	)	$	4.54
Forfeited		--			--
Outstanding at September 30, 201 7		9,163		$	3.65