Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			12 Months Ended	1 Months Ended	0 Months Ended
	Mar. 31, 2015 Financial_Institution	Mar. 31, 2014	Mar. 31, 2015 Segment Financial_Institution	Dec. 31, 2014	Mar. 31, 2014	Sep. 30, 2014 Segment	Jun. 30, 2014	Dec. 22, 2014 Individual	Jan. 14, 2014	Sep. 30, 2013	Dec. 31, 2013
Basis of Presentation and Significant Accounting Policies [Line Items]
Number of operating segment			3			1
Number of reporting segment			1
Hosting agreement term					1 year
Standard product warranty term minimum					90 days
Standard product warranty term maximum					1 year
Period of hosting contracts to customers					1 year
Cash and cash equivalents with U.S. financial institutions	$ 538,000		$ 538,000
Number of major financial institutions with which cash and cash equivalents are deposited	2		2
Cash and cash equivalents with foreign subsidiary financial institutions	2,100,000		2,100,000
Accounts receivable, allowances	180,000		180,000			150,000
Original maturity of cash and cash equivalents			3 months
Cash and cash equivalents	2,610,000	4,365,000	2,610,000		4,365,000	4,344,000				3,482,000
Credit period of accounts receivable			30 days
Estimated economic life of the product			3 years
Capitalized internal and external development costs, gross			533,000			533,000
Total amortization expense of software development costs			89,000		89,000
Gain on investment		1,391,000			1,391,000
Tax expense on investment					901,000
Equity in earnings of investment in Mediasite KK		15,000			38,000
Legal contingency settlement terms			The key terms of the agreement were 1) a grant of a non-revocable license of Astute patents to the Company; 2) a grant of a fully paid, non-refundable license of certain Sonic Foundry patents to Astute; 3) both Astute and our customer agreed to identify three meetings they currently capture that the other party will not seek or respond to any request for proposal; and 4) a payment of $1.35 million to Astute.
Legal contingencies expense						428,000
Product right asset related to legal settlement	672,000		672,000
Legal contingencies amount			0			0
Weighted average grant date fair value of options granted			$ 3.19
Unrecognized non vested stock based compensation	1,100,000		1,100,000
Estimated forfeitures for unrecognized non vested stock based compensation	182,000		182,000
Expected weighted average life of forfeited cost			2 years 2 months 12 days
Stock-based compensation	222,000	193,000	538,000		475,000
Cash received from exercises under all stock option plans and warrants	8,000	147,000	8,000		32,000
Tax benefits realized for tax deductions from option exercises			0		0
Expected shares issued	150,000		150,000
Number of complete employment days on first day of each offering period			90 days
Employee not eligible to participate			5.00%
Eligible employees contribution to purchase price			10.00%
Restricted participant under purchase plan that exceeds rate of fair value of shares			25,000
Restricted participant under purchase plan that exceeds number of shares			1,000
Offering period			6 months
Purchase shares of common stock at a purchase price fair market			85.00%
Shares available to issue	46,703		46,703
Shares purchased by employees				5,780
Stock-based compensation	8,000	8,000	14,000		11,000
Selling and marketing expenses [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Stock-based compensation	143,000	127,000	338,000		314,000
General and administrative expenses [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Stock-based compensation	22,000	11,000	106,000		28,000
Product development expenses [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Stock-based compensation	57,000	55,000	94,000		133,000
The Company [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Payment for legal settlements							1,100,000
Customer Related Litigation [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Payment for legal settlements							1,350,000
Warrant [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Warrants issued to individuals								74,802
Number of individual issued warrants								2
Warrants expiration period								5 years
Warrants exercise price								$ 14.00
Remaining contractual life of warrants outstanding			4 years 8 months 23 days
Fair value of warrants								$ 133,000
Prior to Amendment [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Expected shares issued		100,000			100,000
Mediasite KK [Member]
Basis of Presentation and Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage									26.00%		26.00%
Remaining percent of stock purchased									74.00%
Percent of stock									100.00%