Note 12 - Commitments and Contingencies (Details Textual)		6 Months Ended
	Sep. 04, 2014 USD ($) ft²	Jun. 30, 2015 USD ($)
Buffalo Grove [Member] | Long Term Operating Lease Agreement [Member] | Building [Member]
Area of Real Estate Property | ft²	2,900
Lessee Leasing Arrangements Operating Leases Number of Extension Options	1
Lessee Leasing Arrangements, Operating Leases, Renewal Term	3 years
Operating Leases, Number of Months from Lease Inception that Monthly Rent is Not Required to Be Paid	5
Operating Leases Monthly Rent Expense	$ 6,000
Operating Leases Annual Rent Expense	72,000
Operating Leases Annual Increase in Rent Expense for First Year	6,100
Operating Leases Annual Increase in Rent Expense For Second Year and Thereafter	$ 6,200
Long-term Purchase Commitment, Amount		$ 2,149,002