Note 5 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

	Six Months Ended June 30, 2017
	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
Outstanding at beginning of period		3,380,615		$	2.00
Granted		1,390,000			0.75
Exercised		—			—
Canceled and Forfeited		(528,198	)		1.59
Expired		—			—
Outstanding at end of period		4,242,417		$	1.64		6.9	$	7,400
Exercisable at end of period		2,748,183		$	2.08		5.4	$	7,400

	Six Months Ended June 30, 2017
	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at beginning of period		207,000		$	1.17
Granted		200,000			0.51
Vested		(207,000	)		1.17
Forfeited		—			—
Unvested at end of period		200,000		$	0.51