Note 7 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
Statement of Operations Classification	2015		2014		2015		2014
Costs of revenue	$	2,000	$	3,700	$	5,000	$	3,100
Selling and marketing expense		29,500		21,000		58,800		26,900
General and administrative expense		130,500		109,200		298,600		246,400
Research and development expense		28,100		26,600		50,000		53,800
	$	190,100	$	160,500	$	412,400	$	330,200

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

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Terms (Years)		Aggregate Intrinsic Value
Outstanding – March 31, 2015		10,210,499		$	0.18
Granted		—			—
Exercised		(12,500	)		0.06
Forfeited or expired		(476,818	)		0.22
Outstanding – June 30, 2015		9,721,181		$	0.18		7.17	$	32,200

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Terms (Years)		Aggregate Intrinsic Value
Outstanding – December 31, 2014		10,287,999		$	0.18
Granted		—			—
Exercised		(90,000	)		0.05
Forfeited or expired		(476,818	)		0.22
Outstanding – June 30, 2015		9,721,181		$	0.18		7.17	$	32,200

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value		Weighted Average Remaining Recognition Period (Years)		Unrecognized Compensation Cost Remaining
Unreleased – March 31, 2015		4,022,184		$	0.17
Awarded		—			—
Released		(517,834	)		0.19
Forfeited		(59,970	)		0.17
Unreleased – June 30, 2015		3,444,380		$	0.17		2.10	$	498,100

	Number of Shares			Weighted Average Grant Date Fair Value		Weighted Average Remaining Recognition Period (Years)		Unrecognized Compensation Cost Remaining
Unreleased – December 31, 2014		4,314,983		$	0.18
Awarded		225,000			0.16
Released		(955,412	)		0.19
Forfeited		(140,191	)		0.17
Unreleased – June 30, 2015		3,444,380		$	0.17		2.10	$	498,100