Note 17 - Contingent Liabilities and Commitments (Details Textual)	1 Months Ended						12 Months Ended
	Apr. 30, 2015 USD ($)	Jun. 30, 2014 USD ($) ft²	Apr. 30, 2014 USD ($)	Apr. 30, 2013 USD ($)	Apr. 30, 2012 USD ($)	Jul. 31, 2011 ft²	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Payments for Rent							$ 575,516	$ 570,078
Contractual Obligation							$ 1,115,193	$ 571,615
Standby Letters of Credit [Member]
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
Contractual Obligation Reduction Forty Three Months from Initial Term					50,000
Lawrenceville New Jersey [Member]
Area of Real Estate Property | ft²		11,500				10,870
Lessee Leasing Arrangements, Operating Leases, Term of Contract						5 years 180 days
Number of Months in Which Free Rent Is Provided						180 days
Payments for Rent					23,000
Reduction of Escrow Deposit	$ 50,000		$ 50,000	$ 50,000
Lawrenceville New Jersey [Member] | Standby Letters of Credit [Member]
Contractual Obligation					$ 250,000
Premises Located in Huntsville Alabama [Member]
Lessee Leasing Arrangements, Operating Leases, Term of Contract		13 years
Operating Leases Monthly Rent Payment		$ 23,200