Note 16 - Stock Option Plans - Summary of Stock Option Plans (Details) - $ / shares		3 Months Ended
	Dec. 16, 2015	Dec. 31, 2016	Dec. 31, 2015
Outstanding options at the beginning of period (in shares)		949,667	1,043,566
Outstanding options at the beginning of period (in dollars per share)		$ 8.47	$ 8.47
Options granted (in shares)	67,100		67,100
Options granted (in dollars per share)			$ 7.93
Options exercised (in shares)
Options exercised (in dollars per share)
Options forfeited/cancelled (in shares)		(52,500)
Options forfeited/cancelled (in dollars per share)		$ 14.16
Outstanding options at the end of period (in shares)		897,167	1,110,666
Outstanding options at the end of period (in dollars per share)		$ 8.14	$ 8.43
Options Exercisable, Number of Shares Exercisable (in shares)		844,829	965,325
Options Exercisable, Weighted Average Exercise Price (in dollars per share)		$ 8.15	$ 8.46