Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	Beginning Balance		Charge Offs		Recoveries		Provision		Ending Balance
2013	$	33,900	$	—	$	—	$	8,100	$	42,000
2012	$	25,000	$	—	$	—	$	8,900	$	33,900

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

	2013		2012
Cost of revenue	$	5,300	$	22,200
Selling and marketing expense		180,600		128,900
General and administrative expense		331,300		478,700
Research and development expense		281,000		342,600
	$	798,200	$	972,400

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

	2013			2012
Estimated volatility	113%	-	125%	70%	-	174%
Annualized forfeiture rate	5.34%	-	10.02%	0.0%	-	9.79%
Expected option term (years)		10.00		0.25	-	10.00
Estimated exercise factor	6.5	-	15	5	-	15
Approximate risk-free interest rate	2.71	-	2.74%	0.08%	-	2.04%
Expected dividend yield		—			—