Note 7 - Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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 March 31,
Statement of Operations Classification	2014			2013
Costs of revenue	$	(600	)	$	2,100
Selling and marketing expense		5,900			40,500
General and administrative expense		137,200			94,900
Research and development expense		27,200			48,300
	$	169,700		$	185,800

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 – December 31, 2013		12,019,328		$	0.21
Granted		—			—
Exercised		(215,757	)		0.20
Forfeited or expired		(241,516	)		0.20
Outstanding – March 31, 2013		11,562,055		$	0.20		5.37	$	246,800

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]

	Number of Shares			Weighted  Average Grant Date Fair Value		Weighted Average Remaining Recognition  Period (Years)		Unrecognized Compensation Cost  Remaining
Unreleased – December 31, 2013		3,938,426		$	0.28
Awarded		385,000			0.30
Released		(476,259	)		0.28
Forfeited		(1,169,347	)		0.22
Unreleased – March 31, 2014		2,677,820		$	0.31		2.03	$	674,400