Note 14 - Contingent Liabilities and Commitments (Details Textual)	1 Months Ended
	Apr. 30, 2017 USD ($) ft²	Jun. 30, 2014 USD ($) ft²	Apr. 30, 2013 USD ($)	Apr. 30, 2012 USD ($)	Jul. 31, 2011 ft²	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Contractual Obligation						$ 907,850	$ 1,115,193
Standby Letters of Credit [Member]
Contractual Obligation Reduction Nineteen Months from Initial Term				$ 50,000
Contractual Obligation Remaining				100,000
Lawrenceville New Jersey [Member]
Area of Real Estate Property | ft²	7,565	11,500			10,870
Lessee, Operating Lease, Term of Contract					5 years 180 days
Number of Months in Which Free Rent Is Provided	120 days				180 days
Payments for Rent				23,000
Reduction of Escrow Deposit			$ 50,000
Lessee, Operating Lease, Additional Term of Contract	5 years 120 days
Operating Leases, Monthly Rent Payment in First Year	$ 18,900
Operating Leases, Monthly Rent Payment in Final Year	$ 20,500
Lawrenceville New Jersey [Member] | Standby Letters of Credit [Member]
Contractual Obligation				$ 250,000
Premises Located in Huntsville Alabama [Member]
Lessee, Operating Lease, Term of Contract		120 days
Operating Leases, Monthly Rent Payment		$ 23,200