Stock Options and Warrants (Tables)

3 Months Ended

Mar. 31, 2016

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

The following table summarizes weighted-average assumptions using the Black-Scholes option-pricing model used on the date of the grants issued during the First Quarter 2016 and the First Quarter 2015:

	First Quarter
	2016			2015
Volatility		62	%		64	%
Expected term (years)		10 yrs			10 yrs
Risk-free interest rate		1.94	%		1.92	%
Dividend yield		0	%		0	%

Warrant [Member]

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

Warrant activity for the First Quarter 2016 and the First Quarter 2015 is summarized as follows:

	First Quarter 2016						First Quarter 2015
	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of March 31, 2016		Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of March 31, 2015
Warrants outstanding at beginning of period		2,385,000	$	0.17				3,303,000	$	0.17
Granted		0		NA				0		NA
Exercised		0		NA				0		NA
Cancelled/expired		0		NA				0		NA
Warrants outstanding at end of period		2,385,000	$	0.17		None		3,303,000	$	0.17	$	0
Warrants exercisable at end of period		2,385,000	$	0.17				3,303,000	$	0.17

Employee Stock Option [Member]

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

Stock option activity for the First Quarter 2016 and the First Quarter 2015 is summarized as follows (the figures contained within the tables below have been rounded to the nearest thousand):

	First Quarter 2016						First Quarter 2015
	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of March 31, 2016		Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of March 31, 2015
Options outstanding at beginning of period		1,435,000	$	0.14				1,295,000	$	0.31
Granted		750,000	$	0.11				10,000	$	0.13
Exercised		0		NA				0		NA
Cancelled/expired		0		NA				(57,000)	$	1.01
Options outstanding at end of period		2,185,000	$	0.13	$	9,000		1,248,000	$	0.23	$	13,000
Options exercisable at end of period		1,037,000	$	0.15				889,000	$	0.26