Note 6 - Inventories

12 Months Ended

Dec. 31, 2014

Balance Sheet Related Disclosures [Abstract]

Schedule of Utility Inventory [Table Text Block]

6. Inventories

Inventories consist of the following:

	December 31,
	2014		2013
Raw materials	$	6,161,363	$	5,926,030
Work-in-process		3,041,227		2,308,233
Finished goods		3,204,186		2,762,522
Total	$	12,406,776	$	10,996,785