Note 6 - Capital Stock, Treasury Stock, Contributed Capital and Stock Options (Details Textual) - USD ($)	3 Months Ended				9 Months Ended		28 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Sep. 30, 2014	Feb. 27, 2013
Common Class A [Member] | Omnibus 2013 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period							0
Common Stock, Capital Shares Reserved for Future Issuance									150,000
Common Class A [Member] | Directors Plans [Member] | Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit					$ 2.925
Common Class A [Member] | Directors Plans [Member] | Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit					$ 11
Common Class A [Member] | Directors Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period					3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					20,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	20,000		29,000		20,000	29,000	20,000	22,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period		2,000		2,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price		$ 6.45		$ 7.25
Common Class A [Member]
Common Stock, Capital Shares Reserved for Future Issuance	947,233				947,233		947,233
Directors Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	5.00%		5.00%		5.00%	5.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years		10 years		10 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%		0.00%		0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	0.87%		0.87%		0.87%	0.87%
Allocated Share-based Compensation Expense	$ 0		$ 543		$ 543	$ 2,294