Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	$ 34,222,427		$ 34,222,427
Exercise of stock options	$ 299,472		$ 547,455
Exercise of stock options (in Shares)	112,656	48,108	187,653	340,021
Repurchase and retirement of shares	$ (489,536)		$ (8,201,681)
Repurchase and retirement of shares (in Shares)		0
Stock-based compensation	124,605		249,653
Income tax effect related to stock options exercised	676,060		1,088,702
Net income for the period	2,284,995	$ 1,347,182	5,118,938	$ 1,824,021
Increase to reflect the present value of Redeemable non-controlling interest	(12,150)		(12,150)
Unrealized loss on foreign currency forward contracts treated as hedges	(38,046)		(998,912)
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges	371,955	$ 145,141	788,029	$ 380,192
Common Stock [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	$ 14,411,616		$ 14,411,616
Balance (in Shares)	11,083,976		11,083,976
Exercise of stock options	$ 469,394		$ 830,343
Exercise of stock options (in Shares)	112,656		187,653
Repurchase and retirement of shares	$ (32,783)		$ (548,786)
Repurchase and retirement of shares (in Shares)	(25,413)		(433,409)
Additional Paid-in Capital [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	$ 22,492,630		$ 22,492,630
Exercise of stock options	(169,922)		(282,888)
Repurchase and retirement of shares	(456,753)		(7,652,895)
Stock-based compensation	124,605		249,653
Income tax effect related to stock options exercised	676,060		1,088,702
Retained Earnings [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	(1,848,495)		(1,848,495)
Net income for the period	2,284,995		5,118,938
Increase to reflect the present value of Redeemable non-controlling interest	(12,150)		(12,150)
AOCI Attributable to Parent [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	(833,324)		(833,324)
Unrealized loss on foreign currency forward contracts treated as hedges	(38,046)		(998,912)
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges	$ 371,955		$ 788,029