Stock Options: (Tables)

3 Months Ended

Mar. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]

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

The following is a summary of stock option activity under the stock option plans for the three months ended March 31, 2016:

					Weighted-
					Average
			Weighted-		Remaining		Aggregate
			Average		Contractual		Intrinsic
	Number of		Exercise		Term		Value
	Shares		Price		(Years)		(in thousands)
Options outstanding at January 1, 2016		8,582,952	$	1.32		7.5	$	0
Options granted		300,000	$	0.60
Less options forfeited		(280,418)	$	0.66
Less options expired		-	$	0.00
Less options exercised		-	$	0.00
Options outstanding at March 31, 2016		8,602,534	$	1.33		8.0	$	0
Options exercisable at March 31, 2016		6,004,722	$	1.40		7.4	$	0

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following is a summary of stock options outstanding under the plans as of March 31, 2016:

		Stock Options Outstanding					Stock Options Exercisable
			Weighted Avg.		Weighted Avg.				Weighted Avg.
Range of	Number of		Contractual Life		Exercise		Number of		Exercise
Exercise Prices	Shares		(years)		Price		Shares		Price
$ 0.01 - $ 0.71		828,082		9.12	$	0.61		603,082	$	0.60
$ 0.80 - $ 1.00		3,062,048		8.18	$	0.93		1,410,709	$	0.96
$ 1.11 - $ 1.55		1,120,000		7.99	$	1.32		815,013	$	1.24
$ 1.64 - $ 2.22		3,592,404		7.55	$	1.82		3,175,918	$	1.78
		8,602,534		7.98	$	1.32		6,004,722	$	1.40