Credit Arrangements - Other Indebtedness (Details) - USD ($)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Line of Credit Facility [Line Items]
Current portion of subordinated note payable	$ 93,000	$ 186,000
Senior Notes [Member]
Line of Credit Facility [Line Items]
Gain on foreign currency	$ 3,000	202,000
Mitsui Sumitomo Bank [Member]
Line of Credit Facility [Line Items]
Annual interest rate	1.575%
Mitsui Sumitomo Bank [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Notes payable outstanding	$ 198,000	418,000
Mitsui Sumitomo Bank [Member] | Notes Payable [Member]
Line of Credit Facility [Line Items]
Notes payable outstanding	$ 0	25,000
Media Mission [Member] | Senior Notes [Member]
Line of Credit Facility [Line Items]
Notes payable outstanding		278,000
Annual interest rate	6.50%
Mediasite KK [Member] | Senior Notes [Member]
Line of Credit Facility [Line Items]
Notes payable outstanding	$ 0	$ 0