Note 7 - Results of Operations by Quarter (Unaudited) - Summary of Operations by Quarter (Details) - USD ($)	3 Months Ended									12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 9,017,000	$ 10,338,000	$ 11,442,000	$ 10,815,000	$ 10,760,000		$ 10,503,000	$ 11,392,000	$ 11,323,000	$ 41,612,000	$ 43,978,000	$ 43,423,000
Costs and expenses	12,337,000	12,120,000	12,018,000	11,777,000	11,812,000		11,636,000	12,358,000	11,684,000
Loss from operations	(3,320,000)	(1,782,000)	(576,000)	(962,000)	(1,052,000)		(1,133,000)	(966,000)	(361,000)
Other income, net	948,000	1,159,000	728,000	827,000	532,000	[1]	1,106,000	795,000	769,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(2,372,000)	(623,000)	152,000	(135,000)	(520,000)		(27,000)	(171,000)	408,000	(2,978,000)	(310,000)	141,000
Benefit from income taxes	1,410,000	285,000	55,000	185,000	360,000		60,000	675,000	25,000	1,935,000	1,120,000	490,000
Net income (loss)	$ (962,000)	$ (338,000)	$ 207,000	$ 50,000	$ (160,000)		$ 33,000	$ 504,000	$ 433,000	$ (1,043,000)	$ 810,000	$ 631,000
Basic and diluted net income (loss) per share (in dollars per share)	$ (0.70)	$ (0.25)	$ 0.15	$ 0.04	$ (0.11)		$ 0.02	$ 0.37	$ 0.31	$ (0.76)	$ 0.59	$ 0.46

[1] Includes other-than-temporary impairment losses on investments of $376,000