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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation, Activity [Table Text Block]

A summary of the status of the Company’s non-vested stock options at December 31 and changes during the year is as follows:

		2018								2017
		Number of ‎Options				Weighted ‎Average Grant ‎Date Fair Value				Number of ‎Options				Weighted ‎Average Grant ‎Date Fair Value
Non-vested stock options at January 1			238,871			$	4.27				335,283			$	5.09
Granted			224,000			$	1.94				127,000			$	3.74
Vested			(122,647	)		$	4.15				(207,457	)		$	5.16
Exercised			-				-				-				-
Forfeited/Expired/Exchanged			(47,909	)		$	3.82				(15,955	)		$	5.15
Non-vested stock options at December 31			292,315			$	2.61				238,871			$	4.27

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

The following weighted-average assumptions were utilized in the calculation of the fair value of the stock options:

Expected life		6.20 years
Weighted average volatility			70	%
Forfeiture rate			15	%
Weighted average risk-free interest rate			2.74	%
Expected dividend rate			0	%

Schedule Of Employee Service Share Based Compensation Unrecognized Period Costs [Table Text Block]

At December 31, 2018, there was $377,000 of total unrecognized compensation cost related to non-vested stock option-based compensation arrangements granted under the Plan. That cost is expected to be recognized in future years as follows:

2019			184,000
2020			119,000
2021			63,000
2022			11,000
		$	377,000

Schedule Of Recognized Compensation Cost [Table Text Block]

The recognized compensation cost associated with the Plan is as follows:

		2018				2017
Research and development		$	145,000			$	119,000
General and administrative			79,000				250,000
Effect on net loss		$	224,000			$	369,000
Effect on net loss per share		$	0.01			$	0.02

Schedule Of Share Based Compensation Warrants Activity [Table Text Block]

The following table summarizes the number of warrants, the weighted average exercise price, and weighted average life (in years) by price for both total outstanding warrants and total exercisable warrants at December 31, 2018:

				Total Outstanding Warrants
Exercise Price				Warrants				Wtd. Avg. ‎Exercise ‎Price				Remaining ‎Life ‎(in years)
	$1.80				80,000			$	1.80				2.13
	$4.00				2,395,471			$	4.00				0.07
	$10.00				20,313			$	10.00				0.18
					2,495,784			$	3.98

Equity Incentive Plan [Member]

Share-based Compensation, Activity [Table Text Block]

Activity under the Plan is as follows:

		2018				2017
Reserved but unissued shares under the Plan, beginning of year			191,656				266,884
Increases in the number of authorized shares under the Plan			1,106,088				255,261
Grants of stock options			(224,000	)			(127,000	)
Stock option forfeitures			337,583				15,955
Exercise of stock options			-				-
Stock grants			(114,865	)			(219,444	)
Stock grant forfeitures			-				-
Reserved but unissued shares under the Plan, end of year			1,296,462				191,656

Consultant Plan [Member]

Share-based Compensation, Activity [Table Text Block]

Activity under the Consultant Plan is as follows:

		2018				2017
Reserved but unissued shares under the Consultant Plan at January 1			99,159				83,633
Increases in the number of authorized shares under the Consultant Plan			110,546				25,526
Stock grants			(10,000	)			(10,000	)
Reserved but unissued shares under the Consultant Plan at Period End			199,705				99,159

Warrant [Member]

Schedule Of Share Based Compensation Warrants Activity [Table Text Block]

A summary of the Company’s warrant activity and related information is as follows:

		2018								2017
		Warrants				Weighted ‎Average ‎Exercise ‎Price				Warrants				Weighted ‎Average ‎Exercise ‎Price
Outstanding at January 1			2,495,784			$	3.98				445,313			$	4.65
Granted			-				-				2,395,471			$	4.00
Exercised			-				-				-				-
Forfeited/Expired			-				-				(345,000	)		$	5.00
Outstanding at Period End			2,495,784			$	3.98				2,495,784			$	3.98

Employee Stock Option [Member]

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

A summary of the Company’s stock option activity and related information is as follows:

		2018												2017
		Options to ‎Purchase ‎Common ‎Stock				Weighted ‎Average ‎Exercise ‎Price				Weighted ‎Average ‎Remaining ‎Contractual ‎Life (in ‎years)				Options to ‎Purchase ‎Common ‎Stock				Weighted ‎Average ‎Exercise ‎Price				Weighted ‎Average ‎Remaining ‎Contractual ‎Life (in ‎years)
Outstanding at January 1			993,860			$	4.81				6.94				882,815			$	4.98				7.51
Granted			224,000			$	1.94				9.23				127,000			$	3.69				9.48
Exercised			-				-				-				-				-				-
Forfeited/Expired/Exchanged			(337,583	)		$	4.19				-				(15,955	)		$	5.15				-
Outstanding at December 31			880,277			$	4.32				9.04				993,860			$	4.81				6.94
Exercisable at December 31			587,962			$	5.17				6.49				754,989			$	4.98				6.32

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