Note 13 - Contingent Liabilities and Commitments (Details Textual)	1 Months Ended
	Apr. 30, 2017 USD ($) a	Apr. 30, 2015 USD ($)	Jun. 30, 2014 USD ($) ft²	Apr. 30, 2014 USD ($)	Apr. 30, 2013 USD ($)	Apr. 30, 2012 USD ($)	Jul. 31, 2011 ft²	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Contractual Obligation								$ 804,762	$ 1,115,193
Standby Letters of Credit [Member]
Contractual Obligation Reduction Forty Three Months from Initial Term						$ 50,000
Contractual Obligation Reduction Nineteen Months from Initial Term						50,000
Contractual Obligation Remaining						100,000
Contractual Obligation Reduction Thirty One Months from Initial Term						50,000
Lawrenceville New Jersey [Member]
Number of Months in Which Free Rent Is Provided	120 days						180 days
Payments for Rent						23,000
Reduction of Escrow Deposit		$ 50,000		$ 50,000	$ 50,000
Lessee, Operating Lease, Additional Term of Contract	5 years 120 days
Escrow Deposit	$ 50,000
Operating Leases, Monthly Rent Payment in First Year	18,900
Operating Leases, Monthly Rent Payment in Final Year	$ 20,500
Area of Real Estate Property	7,565		11,500				10,870
Lessee, Operating Lease, Term of Contract							5 years 180 days
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			210 days
Operating Leases, Monthly Rent Payment			$ 23,200