Litigation	9 Months Ended
Jun. 30, 2011
Loss Contingencies [Line Items]
Contingencies Disclosure [Text Block]	Litigation The Company was a defendant in a patent infringement suit commenced by Lectrolarm Custom Systems, Inc. ("Lectrolarm") in May 2003 in the United States District Court for the Western District of Tennessee. The alleged infringement by the Company related to its dome camera and system controller product lines, among other products that collectively represent significant sales to the Company. On July 13, 2011, the Company entered into a settlement and release agreement with Lectrolarm to settle the patent infringement suit. Under the settlement, the Company made a one-time payment of $5 million to Lectrolarm in exchange for the release of all current and future claims against the Company and the dismissal of Lectrolarm's suit pending in the U.S. District Court. Such settlement amount was recognized as patent litigation settlement expense in the third quarter ended June 30, 2011. Patent litigation settlement expense for the three months ended December 31, 2010 represents legal costs incurred in connection with such litigation. Although the Company and its outside patent counsel believed that the suit was without merit and had vigorously defended itself for over eight years, it decided to settle the matter to end years of management distraction and financial uncertainty since the suit was brought in 2003. In the normal course of business, the Company is a party to certain other claims and litigation. Management believes that the settlement of such claims and litigation, considered in the aggregate, will not have a material adverse effect on the Company’s financial position and results of operations.

Litigation

9 Months Ended

Jun. 30, 2011

Litigation

The Company was a defendant in a patent infringement suit commenced by Lectrolarm Custom Systems, Inc. ("Lectrolarm") in May 2003 in the United States District Court for the Western District of Tennessee. The alleged infringement by the Company related to its dome camera and system controller product lines, among other products that collectively represent significant sales to the Company. On July 13, 2011, the Company entered into a settlement and release agreement with Lectrolarm to settle the patent infringement suit. Under the settlement, the Company made a one-time payment of $5 million to Lectrolarm in exchange for the release of all current and future claims against the Company and the dismissal of Lectrolarm's suit pending in the U.S. District Court. Such settlement amount was recognized as patent litigation settlement expense in the third quarter ended June 30, 2011. Patent litigation settlement expense for the three months ended December 31, 2010 represents legal costs incurred in connection with such litigation. Although the Company and its outside patent counsel believed that the suit was without merit and had vigorously defended itself for over eight years, it decided to settle the matter to end years of management distraction and financial uncertainty since the suit was brought in 2003.

In the normal course of business, the Company is a party to certain other claims and litigation. Management believes that the settlement of such claims and litigation, considered in the aggregate, will not have a material adverse effect on the Company’s financial position and results of operations.