Note 15 - Contingent Liabilities and Commitments (Details Textual)	1 Months Ended
	Apr. 30, 2015 USD ($) ft²	Jun. 30, 2014 USD ($)	Apr. 30, 2014 USD ($)	Apr. 30, 2013 USD ($)	Apr. 30, 2012 USD ($)	Jul. 31, 2011 ft²	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Lawrenceville New Jersey [Member] | Standby Letters of Credit [Member]
Contractual Obligation					$ 250,000
Lawrenceville New Jersey [Member]
Escrow Deposit Related to Operating Lease					250,000
Reduction of Escrow Deposit	$ 50,000		$ 50,000	$ 50,000
Area of Real Estate Property | ft²	11,500					10,870
Lessee Leasing Arrangements, Operating Leases, Term of Contract	1 year 30 days					5 years 180 days
Number of Months in Which Free Rent Is Provided						180 days
Payments for Rent					23,000
Operating Leases Monthly Rent Payment	$ 24,900
Premises Located in Huntsville Alabama [Member]
Lessee Leasing Arrangements, Operating Leases, Term of Contract		1 year 300 days
Operating Leases Monthly Rent Payment		$ 23,200
Standby Letters of Credit [Member]
Contractual Obligation Reduction Thirty One Months from Initial Term					50,000
Contractual Obligation Reduction Nineteen Months from Initial Term					50,000
Contractual Obligation Reduction Forty Three Months from Initial Term					50,000
Contractual Obligation Remaining					$ 100,000
Contractual Obligation							$ 852,243	$ 571,615