Note 6 - Capital Stock, Treasury Stock, Contributed Capital and Stock Options: (Detail) (USD $)	3 Months Ended													3 Months Ended	27 Months Ended	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Common Class A [Member] Directors Plans [Member]	Dec. 31, 2012 Common Class A [Member] Minimum [Member]	Dec. 31, 2012 Common Class A [Member] Maximum [Member]	Dec. 31, 2012 Common Class A [Member]	Sep. 30, 2012 Common Class A [Member]	Dec. 31, 2011 Common Class A [Member]	Dec. 31, 2012 Common Class B [Member] Minimum [Member]	Dec. 31, 2012 Common Class B [Member] Maximum [Member]	Dec. 31, 2012 Common Class B [Member]	Sep. 30, 2012 Common Class B [Member]	Dec. 31, 2011 Common Class B [Member]	Dec. 31, 2011 Employee Plans [Member]	Dec. 31, 2012 Employee Plans [Member]	Dec. 31, 2012 Directors Plans [Member]	Dec. 31, 2011 Directors Plans [Member]	Sep. 30, 2012 Directors Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term															10 years
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options			42,000											26,850		38,000	38,000	42,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)														$ 3.55			$ 2.925
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)																	$ 11.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term																3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																3 years
Share-based Compensation (in Dollars)	$ 2,841	$ 2,865														$ 2,841	$ 2,865
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate																5.50%	5.50%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term																10 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate																0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate																0.87%	0.75%
Common Stock, Shares Authorized	1,000,000			3,750,000	10,000,000	10,000,000	10,000,000	10,000,000	1,000,000	2,500,000	2,500,000	2,500,000	12,500,000
Common Stock, Capital Shares Reserved for Future Issuance											769,233