Note 12 - Earn-out Milestone Liability (Details) - USD ($)			1 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jun. 20, 2014	Jun. 30, 2015	Dec. 31, 2015		Dec. 31, 2014
Note 12 - Earn-out Milestone Liability (Details) [Line Items]
Business Combination, Consideration Transferred, Liabilities Incurred							$ 13,878,204
Gain (Loss) From Change in Fair Value of Earn-Out Milestone Liability					$ (257,702)		$ 213,494
EGEN, Inc. [Member]
Note 12 - Earn-out Milestone Liability (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 30,400,000		$ 30,400,000		30,400,000
Business Combination, Consideration Transferred, Liabilities Incurred		$ 13,700,000	$ 13,900,000	$ 13,700,000	13,878,000	[1]
Gain (Loss) From Change in Fair Value of Earn-Out Milestone Liability		$ 213,949			$ (257,702)
EGEN, Inc. [Member] | Minimum [Member]
Note 12 - Earn-out Milestone Liability (Details) [Line Items]
Risk-Adjusted Assessment of Each Milestone	10.00%	10.00%	10.00%		10.00%		10.00%
Estimated Time to Achieve the Milestone	6 months	1 year 73 days	1 year 6 months
EGEN, Inc. [Member] | Maximum [Member]
Note 12 - Earn-out Milestone Liability (Details) [Line Items]
Risk-Adjusted Assessment of Each Milestone	75.00%	67.00%	67.00%		75.00%		67.00%
Estimated Time to Achieve the Milestone	6 years 6 months	6 years 6 months	2 years 6 months

[1] The total aggregate purchase price for the EGEN Acquisition included potential future Earn-Out Payments contingent upon achievement of certain milestones. The difference between the aggregate $30.4 million in future Earn-Out Payments and the $13.9 million included in the fair value of the acquisition consideration at June 20, 2014 was based on the Company's risk-adjusted assessment of each milestone and utilizing a discount rate based on the estimated time to achieve the milestone. These milestone payments will be fair valued at the end of each quarter and any change in their value will be recognized in the financial statement. As of December 31, 2015 and 2014, the Company fair valued these milestones at $13.9 million and $13.7 million, respectively. During 2015, the Company recognized a non-cash charge of $257,702 as a result of the change in the fair value of these milestones from December 31, 2014 and recognized a non-cash benefit of $213,949 during 2014 as a result of the change in the fair value of these milestones from June 20, 2014.