Note 9 - Summary of Nonvested Stock Options (Details) - $ / shares	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2015
Nonvested Stock Option [Member]
Nonvested Stock Options (in shares)	1,020,500	1,098,875
Nonvested Stock Options (in dollars per share)	$ 7.30	$ 7.14
Granted Stock Options (in shares)	23,818	29,500
Granted Stock Options (in dollars per share)	$ 12.24	$ 9.25
Vested (in shares)	(11,250)	(27,500)
Vested (in dollars per share)	$ 7.32	$ 4.02
Forfeited (in shares)		(80,375)
Forfeited (in dollars per share)		$ 6.90
Nonvested Stock Options (in shares)	1,033,068	1,020,500
Nonvested Stock Options (in dollars per share)	$ 7.41	$ 7.30
Nonvested Stock Options (in shares)	1,020,500	1,098,875	1,033,068
Nonvested Stock Options (in dollars per share)	$ 7.30	$ 7.14	$ 7.41
Restricted Stock [Member]
Nonvested Restricted Stock (in shares)	0	0
Nonvested Restricted Stock (in dollars per share)	$ 0	$ 0
Granted (in shares)	8,897
Granted (in dollars per share)	$ 39.34
Nonvested Restricted Stock (in shares)	8,897	0
Nonvested Restricted Stock (in dollars per share)	$ 39.34	$ 0
Nonvested Restricted Stock (in shares)	0	0	8,897
Nonvested Restricted Stock (in dollars per share)	$ 0	$ 0	$ 39.34