Note 5 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

	Six Months Ended June 30 , 201 9
	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding at beginning of period		157,915		$	24.82
Granted		95,250			5.89
Exercised		—			—
Canceled and Forfeited		(5,304	)		8.94
Expired		(9,041	)		31.21
Outstanding at end of period		238,820		$	17.38		7.7	$	—
Exercisable at end of period		78,074		$	33.81		5.1	$	—

	Six Months Ended June 30 , 201 9
	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at beginning of period		5,000		$	7.42
Granted		15,000			2.75
Vested		(5,000	)		7.42
Forfeited		—			—
Unvested at end of period		15,000		$	2.75